Top Definition
A j-slap is when a romantic partner licks his or her hand and slaps a girls vajayjay (vagina) to lubricate and excite their partner.
Hey baby, let me help you out *licks his hand and gives her a j-slap.*
by kathom86 April 05, 2013
1 more definition
When you ejaculate into your hand and slap somebody else with the hand you ejaculated into across the face.
"If you dont stfu im going to J-Slap you."

"Dude Amanda didnt shut the fuck up last night so i had to J-Slap her."
by CowNiggaBalls November 25, 2011

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