Top Definition
n. Any person showing interest or dedication in the fine science of testing the strength of a "fifth" bottle of any alcoholic beverage after drinking it; usually tested in parking lots, random house parties, and occasionally on heads.
Look at those drunkin idiots smashing bottles!

Those are no idiots Evan, there fifthbusters.
by Beerad Reeser November 17, 2009
5 Words related to fifthbusters

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