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1.
I really good jam (or musical piece). Typically rap or rock music.
Can not be applied low-key music, national anthems, or peppy upbeat songs; It has to jam.
Person 1: *riffs on guitar*
Person 2: That was one tasty jam
by Guyver McGuyver December 09, 2010
 
2.
A really good Rap or R&B song.
Guy: Yo nigga check out this tasty jam i've got for ya!
by The Hood #4 December 15, 2008