Sack Stamp

When you are long in the balls and you wear a hole in your underwear creating a stamp or cookie cutter like impression.
Justie was so long in the junk his underwear always rocked a sack stamp
by Senor Bunluv April 05, 2019
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Dirty Sack Stamp

When you take a steaming dump in a pillow case (sack) and then smack an unknowing victim across the face leaving them utterly speechless.
Aaron was walking in from work when I surprised him with a Dirty Sack Stamp to the face.
by Autobot Hero April 29, 2009
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Sack stamp

The heart shaped sweatprint made by a mans hot, sweaty testicles on a chair or other hard surface. It may or may not be accompanied by an ass stamp.
When that dude left the sauna, he left a sack stamp behind.
by jacknut January 18, 2012
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