Top Definition
Phrase. If you say this to someone, it means, get the hell away from me OR shut up. In most cases, it means who gives a damn what you say?
Jill: Hey Bob! Will you go see a movie with me?
Bob: Go sit on a tack.
Jill: You don't have to be so rude.
Bob: Go sit on a tack.
Jill: You are such a dick!
Bob: Go sit on a fucking tack.
by dotnosedgirl January 31, 2011

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