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

ramming your fingers up someone's ass

Hey, let's go check his oil!

by caesar December 09, 2003

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 March 15, 2016

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 June 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 09, 2004

Checking your own oil

When a man is able to fold his penis back and stick it in to his own anus.

Have you ever heard of checking your own oil? I'm sure Ron Jeremy has done it quite a few times.

by ThisSecretNinja April 15, 2010