1 definition by Grimace The Frog

having kinky sex with someone, usually a girl who is already taken.
"i'm gonna go to your place while your at work and frogstomp your girl."

or i frogstomped your mom last night"

or "my boyfriends away and i could use a good frogstomping"
by Grimace The Frog June 7, 2011
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