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The word "sack" refers to one's ball sack.

Sackism is an act of sackish nature - the art of being a sack.

The word "sackism" must be reserved for the most severe instances of idiocy and foolishness only.
Leroy: Look at that car over there! Those boys have got neons on their roof!

Pete: Nah man, that's a police car you bellend!

Leroy: Oh...

Pete: Sackism.
by Aled S March 31, 2008
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