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 the oil

before a male has any physical penal or oral contact with "strange" vagina, he must first "check the oil". a simple dip of the finger with a discreet sniff, sniff will do. if the oil needs changing the test finger should be jammed into the female's nostril. if not, have at it, til its done swoll.

yo gashmaster, what's that gnarly patch on your upper lip? didn't you check the oil before lickin the wound?

after checkin the oil, i told her to turn around for some puppy.

by buzz August 18, 2003

check the oil

to stick ones thumbn in another persons ass hwhile they aren't expecting it. this is commonly known as checking the oil!
once on has checked the oil it is prpoper to charge them fo rthe service with the credit card.

hey man why did you just stick your thumb up my pooper?
"yeah your oil is a little low "

by the guy rules April 21, 2005

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

check your oil

When you run your finger across your bunghole in order to be certain that you wiped good enough.

I checked my oil and now I know how those stains got in my underwear.

by Bevis October 8, 2004

Check my oil

Putting ones finger in another's anus to "check their oil". Checking their fluid/solids level to be sure they are not to low or high.

Hey babe will you check my oil? (Said girl)

Yeah I can! *Shoves his hand down the back of her pants (boy)

by Souhung July 3, 2017