Top Definition
A term used to describe something that is awesome beyond words.

Used in My Way Entertainment's Ghostbusters parody.

Variants include but are not limited to:
Mutha fuckin' JAM!
JAM!
JAM, nigga!
OH,JAM!
Crazy Bastard #1: "Charles Manson was Mutha fuckin' JAM!"
Crazy Bastard #2: "Naw, naw! Jeffrey Dahmer was JAM, nigga!"
by Horse Nipple March 13, 2008
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