Top Definition
A womans chin used for resting a mans scrotum while recieving oral pleasure
Mind if I come over and use your sack warmer for a couple of hours?
by mooseknuckles November 13, 2002
The act of warming ones balls by releasing flatulence within confined clothing
Yo man, my nutz were cold until I floated a sack warmer.
by The Napalm Overlord April 03, 2014
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