Ass crack of dawn

noun

Definitions

Noun
  1. 1
    An intensifier, used in the same contexts as crack of dawn, but more intense. Canada, US, uncountable, vulgar

Etymology

From ass crack jocularly replacing crack in the (preexisting) noun phrase crack of dawn (= "break of dawn"); although ass crack (cleft, gap) and crack (break) are cognate, the jocularity nonetheless rests on the disjunction that is cognitively close to (albeit by some standards not technically) a pun.

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