one

one (all) in one breath
one all in one piece
one (as) busy as a one-armed paperhanger
one as one
one at one fell swoop
one back to square one
one be a new one on someone
one busy as a one-armed paperhanger
one do someone one better
one every last one
one go in one ear and out the other
one go someone one better
one have a lot going (for one)
one have a one-track mind
one have one foot in the grave
one have one for the road

one in one breath
one in one ear and out (of) the other
one in one fell swoop
one just one of those things
one kill two birds with one stone
one like one of the family
one my one and only
one not one iota
one off to one side
one one and all
one one and the same
one one at a time
one one by one
one one for the (record) books
One One good turn deserves another.
one one in a hundred
one one in a million
one one in a thousand
one one jump ahead (of someone or something)
one one little bit
One One man’s meat is another man’s poison.
One One man’s trash is another man’s treasure.
one one move ahead (of someone or something)
one one-night stand
one one of these days
one one sandwich short of a picnic
One One thing leads to another.
one one to a customer
one one up (on someone)
one one way or another
one on (the) one hand
one pull a fast one
one put all one’s eggs in one basket
one six of one and half a dozen of the other
one There’s more than one way to skin a cat.
one wear more than one hat
one with one hand tied behind one’s back
one a hole in one
one the one and only
oneself suit oneself
onions know one’s onions
only Beauty is only skin-deep.
only in name only
only It (only) stands to reason.
only know something only too well
only my one and only
only only have eyes for someone
only the one and only
onto burst onto the scene
onto onto someone or something
open crack open a bottle
open crack something wide open
open get something out in the open
open in the open
open keep one’s eyes open (for someone or something)
open keep one’s weather eye open
open leave oneself wide open for something
open leave oneself wide open to something
open leave something open
open (like) an open book
open not open one’s mouth
open open a conversation
open open and aboveboard
open open fire (on someone)
open open for business
open open one’s heart (to someone)
open open Pandora’s box
open open season (on someone or something)
open open secret
open open someone’s eyes (to something)
open open something up
open open the door to something
open open to something
open open up
open open (up) a can of worms
open open with something
open read someone like a(n open) book
open receive someone with open arms
open welcome someone with open arms
open an open-and-shut case
open an open book
openers for openers
opening opening gambit
opinion base one’s opinion on something
opinion form an opinion
opinion hazard an opinion
opinion in one’s opinion
opinion a matter of opinion
opinions keep one’s opinions to oneself
opportunity jump at the opportunity
opportunity leap at the opportunity
opportunity seize the opportunity
opposite the opposite sex
or all or nothing
or believe it or not
or by hook or (by) crook
or cash or credit
or coffee, tea, or milk
or come hell or high water
or do or die
or either feast or famine
or fish or cut bait
or fold, spindle, or mutilate
or for better or for worse
or friend or foe
or heads or tails
or hit-or-miss
or know a trick or two
or land up somehow or somewhere
or lend oneself or itself to something
or like it or lump it
or lots of people or things
or make oneself or something a laughingstock
or make or break someone
or more or less
or no ifs, ands, or buts about it
or not know if one is coming or going
or not know whether one is coming or going
or now or never
or one way or another
or or else
or or words to that effect
or publish or perish
or Put up or shut up!

or rain or shine
or sell someone on a plan or idea
or Shape up or ship out.
or sink or swim
or something or other
or sooner or later
or take it or leave it
or take someone down a notch (or two)
or take someone down a peg (or two)
or tell someone a thing or two
or Trick or treat!
or whether or not
or without rhyme or reason
or a number of  things or people
oranges apples and oranges
orbit go into orbit
orbit in orbit
orchard (as) crazy as a peach-orchard boar
orchard crazy as a peach-orchard boar
order back order something
order build something to order
order call the meeting to order
order in apple-pie order
order in order to do something
order in short order
order made to order
order make something to order
order on order
order order someone about
order order someone around
order order something to go
order out of order
order place an order
order put one’s house in order
order the order of the day
ordered just what the doctor ordered
orders follow orders
ordinary out of the ordinary
other bring people or other creatures out in droves
other drop the other shoe
other every other person or thing
other go in one ear and out the other
other have other fish to fry
other have the shoe on the other foot
other in one ear and out (of) the other
other in other words
other laugh out of the other side of one’s mouth
other look the other way
other made for each other
other none other than someone
other on the other hand
other other things being equal
other six of one and half a dozen of the other
other something or other
other There are plenty of other fish in the sea.
other turn the other cheek
other with every (other) breath
other the other side of the tracks
other the other way round
other The shoe is on the other foot.
ounce An ounce of prevention is worth a pound of
cure.
ourselves by ourselves
out act something out
out air something out
out all-out war
out (all) tuckered out
out appear out of nowhere
out ask someone out
out back out (of something)
out bail out (of something)
out bail someone or something out
out battle something out
out bawl someone out
out bear something out
out beat one’s brains out (to do something)
out beat the living daylights out of someone
out beat the stuffing out of someone
out beat the tar out of someone
out belt something out
out black out
out bleep something out
out blow something out of all proportion
out boot someone out
out born out of wedlock
out bottom out
out bow out
out break out
out break (out) in(to) tears
out bring people or other creatures out in droves
out bug out
out burn (oneself) out
out burn out
out burst out crying
out burst out laughing
out call out (to someone)
out cancel something out
out can’t make heads or tails (out) of someone or
something
out carry something out
out check out
out chew someone out
out chicken out (of something)
out chisel someone out of something
out clean out (of something)
out clear out
out come in out of the rain
out come out
out conk out
out con someone out of something
out cop out
out count someone out (for something)
out crank something out
out cry one’s eyes out
out Cut it out!
out cut out for something
out cut out the deadwood
out cut out to be something
out cut the ground out from under someone
out dart in and out
out day in and day out
out day in, day out
out dig something out
out dine out