to fall and impale oneself on ones own penis
if you run in the dark with morning wood you may give yourself an uncle pricky!
your creepy uncle who insists on sleeping in his van in your driveway even though there's an available bed in the house.
as uncle pricky walks out the door...
- is uncle pricky going home?
- no he's going to bed
The act of sticking your penis in a pumpkin before receiving oral sex as a prank.
She had the best evening imaginable, until she went to his room for a nightcap and tasted pumpkin while blowing him . Then his frat buddies jumped out of the closet with a camera and screamed " youve just got an uncle pricky".
A chubby chaser.....
"Damn, old boy is hammered and about to pull an uncle pricky on the kool aid lady."
"You know, hes about to mow a really big lawn"............