the act or sexual pleasing a man (or shemale) in some way, and then right before he/she is about to orgasm, you squeeze the base of the penis until it goes limp. heard to be quite painful.
"Dude i got this chick to give me a hand job but she ended up blueballing me and my balls have been in pain 2 days after that."
© 1999-2015 Urban Dictionary ®
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