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.
by kathom86 April 5, 2013
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."
"Dude Amanda didnt shut the fuck up last night so i had to J-Slap her."
by CowNiggaBalls November 26, 2011