when you finish having sex and you take the condom off, run upstairs and slap your brother in the face with it while he's sleeping.
Brother: last night.. i think something hit me in the face while i was sleeping, but i dont know i didn't wake up.
You: did it feel like a slimy fish slap?
Brother: Yeah, i think so!
by pabloo richardson February 1, 2009
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After a girl giving a man fellatio, the man takes out his penis, wiggles it in her face, and slaps her in the face with his erection. Then putting a fishing hook in her mouth, thus making her the flopping fish.
Patrick-Isn't that illegal?
Josh-Nahhh, almost a sport nowadays.

Dylan- The Flopping Fish Slap's fresh to death, Yadadamean
by IsThatPoop? August 16, 2009
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A variation of a slap bet wherein the loser has to buy a fish for the winner so the winner can slap the loser with it.
Peter: I fish slap bet you thriller will play on halloween night.
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(day after)

Adrian: buy me a wish!
Peter: OH.....crap!
by andrepa November 12, 2009
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when a male ejaculates in his hand and slaps his bitch in the face, in which cum is spread about her face.
gf: dirty bastard u slapped me and my face has ur
bf: really, i just gave u a wet fish slap
gf: wah??
bf: figure it out urself
by DJ SPYKERZ(SCOUSED OUT) November 18, 2009
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Fish slap is when u shove ur whole cock down ur girls Throught and and pull it out and slap her with it
by Fishy Kids January 25, 2021
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