Top Definition
A party where 40 40 ounces of malt liquor are consumed, and Jay-Z is played at maximum volume. No beer 40s are allowed, because they are for pussies.
Doug: Hey, did you hear about that party where they are drinking 40 40s?

Colin: Yeah! Let's go join the 40/40 club.
by ConnCollGod September 28, 2010

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