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The unsightly poof of hair on the top or back of a male's head that is usually left uncorrected after waking up. They either don't care how they look or they're just too old to give a crap.
J: C'mon, we'll be late for brunch with your parents!
K: Honey, I have gotta get rid of this splinja, it looks like I *just* woke up!
J: You'll be fine.. its Sunday, and you're going into Richmond..
splinja by KY724 May 26, 2007
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A combination of the words slut and ninja. A girl who is known to be such a slut that her dick riding skills have reached that of a ninja
Person 1: Ayo Makayla bout hot af
Person 2: nah man you better watch out she a slinja
slinja by EdRychwalski May 11, 2018
Related Words

Splintahs 

meaning sweet, amazing, awesome, sick, cool. Usually comes after the word "mad".
i just pwnd in Halo 3!
Shat dude, thats mad splintahs!

splination 

Also means to splinate

The relaxation and release of pressure from the spinal system when one lies down in their bed.
I find splination very relaxing and essential for muscular recovery.
splination by Nurkiest March 14, 2022
a phrase usually referring to a big black man however he has a white mans penis. usually they are racist towards said penis and commit hate crimes on it.
bro i was about to fuck a dude but he was a splinka!!”
splinka by cuando69 April 7, 2021
A small Asian girl that can be spun during sex.
"Damn! Did you see Kobie Tai in the movie, she's one helluva spinja!"
spinja by D3ansta September 24, 2009
AKA Scott Young.
Asshole second to only that of Ben Guinery.
Maftei: Oh noes, splintax tried to break into my house.
G-Nat: Asshole.
splintax by G-Nat December 25, 2004