Pimped out pants that contain a whole array of speakers, amplifiers, and subwoofers. A party in the pants.
Jack turned up the bass on his jam pants to feel the good vibrations.
by Garrix September 17, 2005
2 more definitions
jam pants refers to the slight stain left on girls pants when they are on their period.
"look at thats girls jam pants"
by blondie! April 22, 2009
what retards wear to school
chris wore jam pants to biology class.
by youknowwho89 September 24, 2005