Top Definition
(adj.)
Phrase used to describe an unbelievable or greatly-exaggerated claim. Usually said to someone other than the person making the claim.

Originally from the phrase "These guys do a buck-40 in my subdivision in there snow-mobiles every winter."
Person 1: I seriously drank at LEAST 48 beers last night!
Person 2 (to person 3): wow, that's a buck-40.
Person 3: Yep.
by mean'him April 19, 2009

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