The act of fisting a woman via punching your hand into her vagina. This is better achieved by adding the words, "Falcon Punch!" whilst performing the act. There is also the much more painful, deadly, and downright disgusting Falcon Kick.
John: Man last night I was with this girl and I couldn't get her to feel anything because she was soo loose.
Jim: Ahh man you should've falcon punched that bitch!
Bill: Last night I falcon punched this chic so bad, it was crazyy!
Jeb: Dude... Did she have to go to the ER? That's fuckin' weird.