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.
Student 2: Dude.... gross.. Classterbation is disturbing.
by NutBustah March 28, 2011
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.
Zach: Yeah, she was sweating like a whore in church.
by Twiggy Lanky Man April 10, 2008
Masterbating with the pinky out.
by Jujuwee May 07, 2017
by TiGGLE BiDDY March 10, 2010
Isaac enjoys classterbation
by Klukluxklandrud April 23, 2018
by Hater Hater gettin Taters April 05, 2015