look up any word, like hipster:
 
1.
The act of a gentlemen urinating in the urinal , while the urinal spews his own urine back at him .
Me : hey bro i gotta take a leak .

Friend: alright man

Friend (5 mins later) : dude what happend to your pants?!?!
Me: oh yeah , i had some "urinal backfire" if you know what i mean.
by Exotic guy December 03, 2013