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1 (Noun): A brief, session of sexual intercourse, where both parties climax within 5 to 15 minutes. The purpose of a fuck-snack is to relieve sexual tension to a managable level, and hold the participants over until such time that the parties can engage in proper coitus.

2 (Noun): A short slam fuck.
After sexting all morning, the sexual tension between Sandy and Tim was palpable; therefore, they had no choice but to share a fuck-snack, in the copy room, over their lunch break.
by The Real G Man February 22, 2013
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(adj) not even worth using the adjective "fucking" to describe the noun, less than fucking worth it.
Look at all those fucksnack assdaggars.
by Fucknugget Joe July 11, 2003
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