When a girl goes to grab a guy's dick, but instead grabs his balls.
"I think Scott's mad at me...I foul balled him pretty hard last night and hurt hium pretty bad."
by Mark Twain February 26, 2005
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A dirty prank where someone poops in the water tank of a commode, leaving a rank smell and bits of poop showing up in the water everytime you flush.
WTF?! I just took a shit, and the toilet is shitting on my shit. Some little shit musta given me a foul ball!
by R. Kemp August 23, 2006
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When you go forward a base but decide that you don't want to do that anymore, so you go back a base.
"So I went to third base last night, but I think I'm just gonna call it a foul ball."
by fuck_you5times November 26, 2008
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A shemale or transsexual, discovered when getting to sexual second or third base, and more rarely, when attempting a straight home run.

Origin: Plays off of a baseball hit into foul territory, and the sexual "bases"
Person 1: "Did you get to third base last night?"
Person 2: "Nah mang, she turned out to be a foul ball!"
Person 1: "That's pretty foul!"
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A sexual situation where the male is going to town own a girl. Just before blowing his load he sticks his fingers in her ass and smears the contents on his balls. He then shoots his load onto her face to make a nice line and then teabags her. His balls will either go left or right and thus the foul ball.
by The V.I.P. January 20, 2005
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When a woman is giving a man special attention to his balls and her wrist spasms and what once was a spicy massage becomes full on testicular torsion.
Dude, she was giving me the best handy ever but she has weak tendons so her hand spazzed and twisted my nuts- foul ball.
by OyeMyBallz September 2, 2023
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