1 definition by Civil Barbarian
The act of sticking a spoon up someone's anus, hence the uncle in the name, and then jimmying it around so as to rupture the colon.
"Did you hear what happened to Frank?"
"Yeah man, some guy gave him an Uncle Jimmy and it almost killed him."
"Yeah man, some guy gave him an Uncle Jimmy and it almost killed him."
by Civil Barbarian January 5, 2017