Witty-Watty is a slang term for midget masturbation.
The sound a midget's balls make when he is masturbating.

"Hey Joey"
"Yeah, Bret?"
"Look at that midget over by the trashcan~"
"Holy cow, Bret. He is getting his witty-watty on!"
"That is hot."
by Cedric Stewart Collins Jr. March 25, 2008
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