The leftover urine that drips onto the pants or shorts after zipping up, giving the impression that one has pissed himself, or the water from a faucet that somehow ends up on said parts. Runoff is commonly hidden or removed by wearing long shirts or utilizing the hand-dryer while no one is around.
Bill: Oh hey man looks like you just pissed your pants!

Sven: F*** runoff!
by Waldosziak February 29, 2012
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A newly 'exed' who is passed on to your girls; a rebound
Your new boyfriend is my ex...a runoff. Don't say I never gave you anything. You're welcome.
by talk2me-JCH2 September 4, 2022
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Probably one of the best blogs on the internet, because it's a bunch of hipster hating hipsters, and they're cool because they can take a little joke about themselves,

Made by Carles, but no one really knows who Carles is, a girl or a guy, old or young, etc. We don't know.
Hey did you hear about how Best Coast insulted Hipster Runoff ?
by RolphSemensDickOvensUWIDI July 27, 2010
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Sperm that leaks out of an anus that has just been ejaculated into.
Alisha's pregnancy is a result of anal runoff.
by anusbeed April 1, 2010
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The water that drips off your boner when you're taking a shower.
I held the boner runoff in my hands but it just slipped through.
by xxJack May 16, 2008
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any type of fluid that streams freely from the loins of an unscrupulous woman whos hobbies include smoking cocain that has been cut with baking soda
don't let her in the car, she might leave a snail trail of crackwhore runoff
by David Scroggins October 20, 2008
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The oozing Orifice Oil dripping out of your previously pounded inner asshole, after a raging round of hot anal.
Did you see the fuck runoff on Gordy's bedroom floor, when Brian left?
by asscream September 5, 2005
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