Classterbation: The art of girls crossing their thighs over their pussy and flexing their thigh muscles, which scrapes their jeans over their clit.
Twiggy: Yo, did you see Aubrey classterbating in Chemistry?

Zach: Yeah, she was sweating like a whore in church.
by Twiggy Lanky Man April 10, 2008
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When one gets the sudden urge to bust a nut midway through class. Normally applicable when there is a sexy female in the area.
Student 1: Hey man, did you see that new girl? she was wearing a skirt and i classterbated after i saw her!
Student 2: Dude.... gross.. Classterbation is disturbing.
by NutBustah March 28, 2011
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I was at a high brow function and classterbation was in order.... Masterbation with the pinky out!
by Jujuwee May 7, 2017
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To jack off in class, if you go to a LAP TOP school, and you sit in the back, have a party!
When you shake your dick in class, to a porno on your laptop, its Classterbating.
by TiGGLE BiDDY March 10, 2010
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Masterbating in a school class or other meeting with peers
Dude, Joe was totally Classterbating in science yesterday!
by Hater Hater gettin Taters April 5, 2015
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