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A contest between individuals in which each participant is given a fifth of liquor of their choice. The objective is to drink the fifth before the end of a designated time period, typically the end of the night. True champions are known to use Bacardi 151.
Paul: Yo Diaz, you have 30 minutes left to finish the fifth challenge

Diaz: Shit man, that's like 5 more shots.
by PaulCP March 28, 2006
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