Top definition
When you vigorously scratch your nuts and then stick your finger in someone's ear
Friend: Why you sticking your finger in my ear bro?
Me: I just scratched my nuts. It's a Nut Willy!
Friend: That's naaaaaasty. Fuck off.
by MemeMan02 September 29, 2018
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2
The act of ejaculating on your finger and sticking it in someone's ear.
"Yo, I just gave Sam a Nut Willy!"

"Gross! Did you just give me a Nut Willy!?!?"
by Slideshow joe May 25, 2016
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