Euphemistic form of when Hell freezes over.

Alternative form of when pigs fly

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

(archaic, slang) An extremely long time ago; long before living memory.

Warning, often in the form of a sign, that people should pay attention when walking on a wet and slippery floor not to fall down and get injured.

Third-person singular simple present indicative form of strike someone when they are down

present participle of hit someone when they are down

Third-person singular simple present indicative form of hit someone when they are down

Third-person singular simple present indicative form of kick someone when they are down

Third-person singular simple present indicative form of kick a dog when it's down