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1.
A shit beat is when you shit in your hand and jerk off.
I jus had a really good shit beat this morning.
by shaque January 28, 2006
 
2.
1. Taking a dump, usually while using laptop
2. Access pornographic material
3. Beat
"Hey man, what are you doing in there?"

"Nothing"

"Are you shitbeating?"

"Yeah"
by Peter the shit beeter April 27, 2009