Crocodile Sex

A term used for fingering someone. The phrase comes from the shape of an crocodile's penis which resembles an arm with fingers attached to it. In it's aroused state, the "fingers" gently curve upwards as if it were gesturing, beckoning a potential mate.

"Hey man, I heard you had sex last night with Shannon"
"Nah brah, it was only crocodile sex. Don't believe me? Smell my fingers.