Combination of shit and fap (mastrubating), as in mastrubating while taking a dump. Side effects unknown.
Ewan: Dude, I just shitfapped BIG time...
Lloyd: ZOMG WTF? You're disgusting!
Cindy: I think shitfapping guys are SOO sexy... It's like, you know... You like, get it all out?
Ewan: Totally...
by Blarghne March 14, 2008
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