1 definition by Watboy
when your in school and you get a random boner and you know you can fap without the teachers finding out.
"Dude i was in social studies and i pulled a sneak fap, i have to go change im all wet."
"I was sneak fapping when my teacher called my name to turn in my work and my pants were all wet and everyone saw."
"I was sneak fapping when my teacher called my name to turn in my work and my pants were all wet and everyone saw."
by Watboy February 23, 2012