check the oil

before a female has any physical contact with "strange" wang, she must first "check the oil". a simple dip of the finger with a discreet sniff will do. if the oil needs changing the test finger should be jammed into the male's ass. if not, have at it, til you're satisfied.

by pun tang October 17, 2003

check your oil

ramming your fingers up someone's ass

Hey, let's go check his oil!

by caesar December 9, 2003

Checking her oil

A test to be preformed on a chick before eating her out. Finger her a bit and catch a whiff of your finger and you'll know if its safe to proceed.

Use your finger like a dipstick to check her oil

Yo man i checked her oil and knew it was safe

or

Yo man i checked her oil and DAMN!!! Was that a stank pussy.

by Herb311 October 25, 2004

checking your oil

When one inserts their finger in their own anus in order to gauge their personal stink level.

Don't touch me bro, you been checking your oil

by Informersno July 26, 2016

check her oil

When engaged in foreplay or intercourse you insert a finger or fingers into your partners anus, thus "checking her oil".

"As I was doing my girl in the doggy position I reached down to check her oil."

by Natedogg370 December 14, 2007

Check your oil

A prostate exam.

I went to the doctor because my nards were sore and the SOB checked my oil.

by t June 29, 2004

check your oil

When someone pisses you off enough that you threaten to stick something, like your foot, up their ass.

Dude, if you don't stop that shit, I'm going to check your oil.

by Oz in the ATL July 23, 2007