Goo Gun; n. The male genitalia, so named for its ability to eject bodily fluids.
Chicho "How did it go last night?"
Joe "I assaulted her with my goo gun!"
To insert a pinky in the anus and a forefinger&middlefinger in the vagina at the same time(with the same hand).
+ That girl was soo freaky she let me use the goo gun on her.
+ 1 in the poo, 2 in the goo!