finger humping 

when a female pleasures herself by inserting her finger into her vagina.

Elise can't come to the phone, she is busy finger humping in the shower

finger humping by timmy leary August 28, 2008

Double Middle Finger Humping 

A gesture done towards someone who does or says something very stupid or ridiclous. It invloves giving the person the finger with both hands and doing a pelvic thrusting motion at the same time. This gesture can be seem most in PARKVILLE

Dude i think they make rootbeer by putting sugar in coke!
-Ur an idiot....(Doube Middle Finger Humping)

Double Middle Finger Humping by parkville April 7, 2005