This term is used for a guy's night out. Almost like a rally cry. It means either getting into a fight and punching someone in the lip or getting a girl back home and splitting the other kind of lips.

"He's over there splitting lips."

"Yo, Creep is in full lip splitting mode tonight, Watch the F out!"

"Turk's gonna split that chick's lips later."
by Mess104 April 15, 2009
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When a man sticks his penis into a girls mouth and proceeds to make a swift, outward movement with his penis into the corner of her lip towards her ear. The objective is to mimic The Joker character in the Batman comic book series.
Bobby: I love asking girls "why so serious?" Then split lipping them during a nice blow job. It's also called giving a girl The Joker!
Troy: Totally! That's my favorite!
by Leona Herman December 8, 2008
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Aka--female, woman.
When I was working in the prison system in pa...a black male trustee..hit the intercom system..and ask me " if da split lips is done in the gym"...i said , " what the fuck.is a split lip"?!...inmate stated " CO you know da females! Are they finished in the gym yet"...I laughed my ass off for the next 20 mins..
by fatboy75 December 29, 2011
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a term commonly used for black people because of constant street fights cause them to often have split lips.
That god damn Split Lip robbed me for all my cash!
by Football king 99 December 13, 2021
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