(idiomatic, slang, informal, hyperbolic) Never; not in this lifetime or a time in the unforeseeably distant future; not a chance.

(idiomatic) forever; without success, no matter how long one perseveres

Euphemistic form of when Hell freezes over.

(humorous) For a very long period of time.

(slang) Extremely cold.

(archaic) second-person singular simple present form of freeze