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33.
What you get after fucking a guy in the ass when he hasn't taken a dump in a few days. A Penis covered in Poo.
Grandpa (in a pirate voice): arrrrrgggg, Billy. Me matey. Shiver me anus!

Billy: first mate reporting for duty!

Grandpa: 'tis a fine instrument you got there, Billy. All hands on the poop deck.

Billy: oh Gramps. Here it comes...

Grandpa: garrrrrrrrrrrrrrrrrrr. That's the stuff.

10 minutes later:

Billy: awwwwww - sick. Grandpa, I have a Poonis.

Grandpa: yarrrr. Gross. Time for a colostomy bag...
by Pollup August 07, 2008
 
1.
A Poonis happens when your taking a poo, and you have an erection at the same time. Note* This must also be a natural boner.(no porn allowed)
Oh boy, I feel a Poonis coming along!
by Bossplaya January 05, 2004
 
2.
a pooni is a caste from punjab india.. it is a jatt .. farmers from the desiest parts of india... not much of em around but there all pre chalaak.
oye pooni sahib... balaa chalaak na ban... apne larh naal mu saaf kar la...
by madjatt January 13, 2012
 
3.
The genitalia of a gay man within 10 minutes of having given anal love.
"After I gave him my love, my poonis was stanky."
by jonnycocksucker July 22, 2009
 
4.
The rest of the definitions are wack. A poonis is simply a penis that has poop on it.
I pulled out of her ass and slapped her face with my poonis.
by Crushing_Doom November 11, 2009
 
5.
A penis which is able to poo.
1) Your poonis may be bigger than mine, however: mine creates larger poochunks than yours on average.
by celllphone May 26, 2009
 
6.
When you have anal sex with a girl that hasn't gone to the toilet and your dick gets shat on.
"Dude, Jess totally forgot to do a shit before we did anal!"

"Unfortunate man, you got a poonis"
by frobrowilldo July 12, 2014
 
7.
A poonis is a penis which pees out poo.
Guy 1: Did you see that shit that came out of that poonis?
Guy 2: Ya that was craaaaaaazy!
by The poonis June 07, 2010