Giffin it 

The act of masturbating in class; also known as classterbating.

That kid was giffin it to that red-headed-chick and got caught by the teacher and got written up..

Giffin it by That kid getting his D WET April 11, 2009

Peter Griffin-it 

Peter Griffin-it (v)

When you have to lift your low-hanging stomach fat to see your genitals, can be used for any gender. Word originates from Peter Griffin from the television show "Family Guy" having to do this act in order to see his genitials.

Wife: "Tom, do you have an erection?".
Husband: "Im not sure, lemme Peter Griffin-it.

Peter Griffin-it by Arizona Concept August 8, 2016

geffin it 

to rock at doing sumthing. (slang for "getting it")

yo mayne, that fool is geffin it with those moves.

geffin it by word2yomother August 26, 2008