when

when push comes to shove

When the situation deteriorates or becomes desperate; when drastic measures are needed. When push comes to shove, I have some extra savings I could tap into. We'll at least have some leverage in the negotiations when push comes to shove.
See also: come, push, shove
Farlex Dictionary of Idioms.

when

/if push comes to shove
At a point when the situation must be confronted and dealt with: When push comes to shove, we'll have to move to a cheaper place.
American Heritage® Dictionary of the English Language, Fifth Edition.
See:
  • (I'll) see you when I see you
  • (one) zigged when (one) should have zagged
  • (someone) (just) doesn't know when to quit
  • (the) shit hits the fan
  • (you) can't take it with you (when you go)
  • a/the liar is not believed when he tells the truth
  • after the dust settles
  • after/when the dust settles
  • as and when
  • as/if/when the spirit moves you
  • chips are down, the
  • come back when you can stay longer
  • cross a bridge when one comes to it
  • cross a bridge when you come to it
  • cross that bridge when (one) comes to it
  • cross that bridge when (one) gets there
  • cross that bridge when (one) gets to it
  • cross that bridge when one comes to it
  • cross that bridge when you come to it
  • evil triumphs when good men do nothing
  • fat hit the fire
  • get going
  • hang up (one's) fiddle when (one) comes home
  • hang up your fiddle when you come home
  • he that will not when he may, when he will he may have nay
  • hit (one) when (one) is down
  • hit somebody when they're down
  • hoist your sail when the wind is fair
  • if and when
  • if frogs had wings, they wouldn't bump their butts (when they hop)
  • if it comes to the point
  • if not now, when?
  • if the spirit moves (one)
  • if you think about it
  • if/when it comes to the crunch
  • if/when it comes to the point
  • if/when push comes to shove
  • if/when you think about it
  • I'll believe it when I see it
  • I'll believe it/that when I see it
  • I'll look you up when I'm in town
  • in (the) blazes?
  • in (the) Sam Hill?
  • in blue blazes?
  • in creation?
  • in tarnation?
  • in thunderation?
  • kick (one) when (one) is down
  • kick somebody when they're down
  • kick someone when they are down
  • know when (one) is not wanted
  • know when one is not wanted
  • liar is not believed when he tells the truth
  • look me up when you're in town
  • monkeys might fly out of my butt
  • my face when
  • my reaction when
  • Needs must when the devil drives
  • no matter what/when/where/why/who/how
  • no matter who, what, where, when, etc.
  • opportunity knocks
  • push comes to shove, if
  • push comes to shove, if/when
  • ready when you are
  • say when
  • seen one, seen them all, if/when you've
  • since when
  • Since when?
  • smile when you say that
  • some people (just) don't know when to give up
  • some people (just) don't know when to quit
  • some people (just) don't know when to stop
  • some people don't know when to quit
  • sun is over the yardarm, when the
  • take it with (one) (when one goes)
  • that feel when
  • that feeling when
  • the eagle flies
  • they broke the mold when they made (someone or something)
  • they broke the mould when they made someone
  • till the cows come home
  • till the fat lady sings
  • time flies when you're having fun
  • time was (when)
  • way back when
  • What's (something) when it's at home?
  • when
  • when (one) is good and ready
  • when (one) is least expecting it
  • when (one) least expects it
  • when (one) was a twinkle in (one's) daddy's eye
  • when (one) was a twinkle in (one's) father's eye
  • when (one's) back is turned
  • when (one's) boat comes in
  • when (one's) ship comes home
  • when (one's) ship comes in
  • when (something) catches a cold, (something else) gets pneumonia
  • when (something) sneezes, (something else) catches a cold
  • when (the) word gets out
  • when A sneezes, B catches a cold
  • when all is said and done
  • when all's (is) said and done
  • when all's said and done
  • when chickens have teeth
  • When do we eat?
  • when everything is said and done
  • when hell freezes over
  • when hell freezes over and the devil learns to (ice) skate
  • when he's, it's, etc. at home?
  • when I was a kid, I walked to school uphill both ways
  • when I was your age, I walked to school uphill both ways
  • when in doubt, do nothing
  • when in Rome
  • when in Rome (do as the Romans do)
  • when in Rome do as the Romans do
  • when it comes right down to it
  • when it comes to
  • when it comes to (someone or something)
  • when it comes to something/to doing something
  • when it comes to the crunch
  • when it comes to the point
  • when it rains, it pours
  • when least expected
  • when life gives you lemons, make lemonade
  • when my ship comes in
  • when one door closes, another (one/door) opens
  • when one door shuts, another (one/door) opens
  • When one door shuts, another opens
  • when one is good and ready
  • when one's back is turned
  • when one's ship comes in
  • when pigs can fly
  • when pigs fly
  • when pigs have wings
  • when poverty comes in (at) the door, love flies out (of) the window
  • When poverty comes in at the door, love flies out of the window
  • when push comes to shove
  • when ship comes in
  • when someone's ship comes in
  • when the balloon goes up
  • when the band begins to play
  • when the cat's away
  • when the cat's away (the mice will play)
  • when the cat's away the mice will play
  • when the cat's away, the mice will play
  • when the chips are down
  • when the dust has settled
  • when the dust settles
  • when the eagle flies
  • when the fat lady sings
  • when the going gets rough
  • when the going gets tough
  • when the going gets tough, the tough get going
  • When the going gets weird, the weird turn pro.
  • when the rubber hits the road
  • when the rubber meets the road
  • when the spirit moves (one)
  • when the time is ripe
  • when the US/UK/China, etc. sneezes, Japan/Germany, etc. catches cold
  • when the wolf comes in (at) the door, love creeps out (of) the window
  • when two Fridays come together
  • when two Sundays come together
  • when two Sundays meet
  • when you come (right) down to it
  • when you get a chance
  • when you get a minute
  • when you get a moment
  • when you get right down to it
  • when you think about it
  • when your back is turned
  • when your ship comes in
  • when your ship/boat comes in
  • when you've seen one (something), you've seen them all
  • when you've seen, heard, etc. one, you've seen, heard, etc. them all
  • who's (someone) when (he's/she's/they're) at home
  • who's someone when they're at home
  • Why buy a cow when (the) milk is free?
  • Why buy a cow when milk is (so) cheap?
  • Why buy a cow when you can get (the) milk for free?
  • Why buy a cow when you can get milk for free?
  • zigged when one should've zagged
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