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The build up of faecal matter and sweat that collects within ones arse cheeks particularly during hot weather or prolonged exposure to leather furniture and PS3 marathons.
Greg – “Seriously Phil, were going to have to pause this awesome game of ‘Call of Duty, Black Ops’”

Phil – “...the fuck dude! We’re just getting to the end of Nuke Town...”

Greg – “I know, sorry buddy, I gotta sort something out...”

Phil – “Oh right, you need a shit”

Greg – “Nah... it's just that i’ve been sitting here for 11 hours now and i’ve got serious arse jam”
by tincopper February 13, 2011
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