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The sexual act of slapping anothers eyes with your testicles.
"Hey Marty did you see Bob's black eyes?"
"Yeah dude, he got the ballseye"
by UPtheNOSEinbetweenTHETOES September 18, 2011
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2
Commonly used to make fun of guys who got hit in the balls, same as in bullseye (right in the spot).
-Wrestler gets kicked in the balls during a wrestling match-

Wrestler: *screams* "ooohhh!!! My balls!!!"
Girls watching the match: Hahaha! ballseye!!!
Wrestler: *cries*
by Nobli May 31, 2012
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3
A perfectly placed throw or strike to the testicles.
Richard wound up and threw the rubber duck, impacting Scott squarely in the testicles - ballseye!
by sjg22 October 26, 2018
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4
An act whereby one male participant places his testicles inside of a pair of water goggles and then leaves said goggles for the next unfortunate individual who stumbles upon said pair of goggles.
Dude, be careful, you don't know if the last guy left those goggles to ballseye someone!
by Dogbros June 07, 2011
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