Masterbating with the pinky out.
by Jujuwee May 07, 2017

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

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 April 13, 2011

by TiGGLE BiDDY March 10, 2010

Isaac enjoys classterbation
by Klukluxklandrud May 29, 2018

by Hater Hater gettin Taters April 04, 2015
