piss funny 

when something is so funny that you literally piss yourself laughing.

dude 1: did you see the sketch that billy connolly did about putting a condom on inside out?

dude 2: haha, yeah it was piss funny.

piss funny by Jonny Foxwell September 26, 2007

Piss-Pants Funny 

The Act of Something or Someone being in the State of Such Concentration and Hilarity, That they have an Involuntary Eruption of Urine; To the Effect that their Pants are Completely and Utterly Soaked in Their own Urine.

"Mitch Hedberg was Piss-Pants Funny!"
"Dude, That guy Falling down the Stairs was Bad, But Piss-Pants Funny."
Man, Yo Momma is So Ugly, She's Piss-Pants Funny..."

Piss-Pants Funny by TheLaughsOnUs April 21, 2011

Fanny Piss 

When a man sits down on toilet while urinating .

That was the best fanny piss ever , i was way too lazy to stand

Fanny Piss by keysersoze1988 May 30, 2010

pissfunny 

Hilarious, very amusing

www.pissfunny.com is pissfunny

pissfunny by Whizz May 4, 2004

pissfunny 

hilarious. Irish colloq

That guy tom he thinks he is pissfunny

pissfunny by Sean October 9, 2003