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)
Yeah I can! *Shoves his hand down the back of her pants (boy)
by Souhung July 3, 2017
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