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 4, 2019

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

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 30, 2012