Gary the Snail
A manouver in which a girl finishes riding your face and dismounts by sliding her vagina across your whole face, leaving a trail of slime like a snail.
John: " Hey bro, How did your date with Ashley go" ?
Blake: " It was cool dude, she stayed the night".
John: " Nice you gonna see her again"?
Blake: " IDK bro she hit me with that Gary the Snail".
John: " Gross".