(figuratively, idiomatic) When the pressure is on; when the situation is critical or urgent; when the time has come for action, even if it is difficult.

(idiomatic) When one makes a significant amount of money. / (idiomatic) When one is successful

Euphemistic form of when Hell freezes over.

(idiomatic) never

(idiomatic) To anticipate dealing with a problem or situation by acting in a manner that alienates or cuts ties with others.

(colloquial) Used when a speaker attempts to categorize an observable fact or event, although the category is subjective or lacks clearly defined parameters.

Third-person singular simple present indicative form of cross that bridge when one comes to it

Third-person singular simple present indicative form of burn that bridge when one comes to it

present participle of cross that bridge when one comes to it

simple past tense and past participle of strike someone when they are down