A slap to the face using the pennis, done in either a playful manner or as a prank on a sleeping or inebriated friend.
The contraction of Pennis and Slap, derrived from the french Biffle.
past participle: Plapped
1.
She said it wasn't very big so I gave her a plap.
2.
Girl: whats a plap?
Man: Here I'll show you.
PLAP
man: you've been plapped
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