When a guy reaches into a girls ass and grabs his own dick to make her pussy tighter...
Phillip worked all night to wedge his hand, bit by bit, into his girlfriends asshole and finally got a "stinky kung fu grip" on his own dick. shortly after he shot his load all in her ass.....
The act of shoving a baby hand in a gay man rectum, whilst the hand contracts making the aforementioned grip. This term is most widely used amongst pedophiles.
Call 911, I think I saw our neighbor with our baby! I believe they are attempting a Scrawny Kung Fu Grip.