Take an overfull cloth diaper, put in microwave on high for 5 minutes. While contents are still scalding hot, press into the face of an unsuspecting friend and scream ‘SURPRISE!!!’
Bill lost his sight and required skin grafts from 3rd degree burns on his face after his mate T-Bone gave him a Slappy Nappy!
by Red monster boy June 19, 2023
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if having a tough time falling asleep, you masturbate until you then fall asleep.
Josh "what you so happy about?"

Robert "just had me a slappy nappy."

Josh "you cum?"

Robert "dur."
by haunted_milksteak November 1, 2011
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To be performed with the girl you love or any girl you see walking down the street. Performed in four steps as follows. 1. Slap her across the face 2. Shit your pants immediately 3. Reach around her and jab her in the left butt cheek with an epi pen 4. Let the magic happen (the magic meaning whatever the fuck happens after these lovely acts have been performed)
“Hey Connor how was your weekend?”
“I gave my girl a slappy crappy no-nappy
“I want to be just like you when I grow up!”
by Captainprice141 March 11, 2023
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