Top definition
the sound made when a man's genetalia hit his leg.

also the sound of a man masturbating.

also refrence to aman's penis.
"I can hear Joe's schlappay from the other room!"
"My schlappay is huge!"
"I like the schlappay feeling of my cock on my leg!"
by flsdhkafhodighakljd asfdsdafg February 09, 2008
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