Top Definition
An exhortation to exhibit manliness; an imperative said to an individual whose conduct is causing a suspicion of a lack of testicles.
robby: O, you bounced the quarter into my cup, that means i must partake, but i have been over-served, i must abstain.

kaz: dude, have sack!

by abelard September 19, 2007
6 Words related to have sack

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