Top Definition
1).The art of mastubation over a girl named Cass.
2). No meaning at all.
"Mmm, Cass was great in bed last night."
"j00 s3r10us? I C4ssturb4t3d"
"You really are a loser, aren't you?"
"Ys3"
by Eight Legged Freak March 02, 2004
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