When your with your friends in a local place and while they are sitting down you run up to them take your hand on the back of their head and put it on your ballsack, and yell "Bitch, You've just been potatoe sacked!" or when your girlfriend is laying down and you perform a teabag only say potatoe sack
by Potatoe_sack April 14, 2009
just like the "tea bag" but a tea bag is small and a patotoe sack is big. so its when you have a very big dick and you tea bag someone.
by shelby nave May 10, 2007