An act of masturbating. Usually is said as if you were playing the penis game. A reatarded word made up by retarded people.
In a classroom: oh my god robert stop mastacating!!
In a crowded elevator with a friend: masatacate!! MASTACATE!!!
by ya im jewish September 27, 2005
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THIS IS A REAL WORD! It means to chew your food.
Mom: Son, you have another phone call. Do you want me too tell them your eating diner?
Son: Yeah just tell them I'm mastacating! They'll deffinatley stop calling
by Nicole Morrow September 25, 2005
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To completely tear something or someone apart.
"Did you see how bad that guy got beat?"

"Yeah, he got mastacated."
by FaShizzle March 6, 2004
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