2 definitions by BLKJAK

Top Definition
The sweat of a male's ball sack. Specifically in enough quantity to moisten the pants pocket lining and then leach into the pocket contents.
John gave Ann some oyster crackers that had been marinading in his ball jus.
by BLKJAK January 11, 2012
Aiming your ejaculate at the mattress instead of releasing it inside of a female, thus risking impregnating said female.
Lebron James' father should have performed mattresscide instead of bringing that useless human into the world.
by BLKJAK June 16, 2011
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