When you stick your finger up someone's asshole checking for poop, while saying "oilcheck".
I was finger banging Sarah and decided to oil check her to see if she would be into anal but she was full oil so I didn't go for it.
by 27 out of 27 November 13, 2014
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The act of shoving your finger into someone's asshole and checking how far up your finger the shit marks go, similar to a dip-stick in a car.
Yeah, after I gave Georgine a Venezuelan Oil Check I knew what she had eaten for the last week.
by dbuts December 19, 2016
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licking your finger, then putting it in someone's a$$hole, then licking your finger again to see how healthy they are or aren't.
"You stink Frenk. Better get a Balkan oil check and lay off the corn been and stick to the veggies for a while."
by CP85 June 23, 2022
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A move a soccor player makes to injury or cramp a opponent. A forced plunging of the thumb or index finger into the anus
Did you see horhe check martinis oil at the game last night?

Yeah was a two dipper!

Checking oil cramped him right up.
by Kerbangocwm December 5, 2017
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Something you tell Lady Erin Brant during a So Bad It's Good episode to totally break her into dying of laughter!
Dave: Erin, it's called an Oil Check! (motioning sticking his thumb up a butt)

Erin: (dying of laughter) No it's not! Is it?!!!
by RekEighty October 6, 2022
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When you suck your pinky finger and insert it an another persons anus then taste your pinky finger again.
That fart smells like you need a balkan oil check. You're probably running hot.
by CP85 June 24, 2022
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