Definitions by N2MT

Sisquatch 

An ugly sister, whether it be your own sister or the sister of a friend.

A sisquatch often displays manly physical features, such as a pronounced jawline, broad shoulders, or large muscle mass throughout the body.

"Hey, I just found out that Tony has an older sister!"

"Well, is she hot?"

"Nah, she's a total sisquatch. You're gonna want to stay away from this one."

Sisquatch by N2MT December 15, 2011