Cow tongue

When someone is receiving a blowjob from their significant other and he/she licks down the shaft to the balls and keeps going; moving backwards between the legs to lick the taint and slide their tongue up the ass crack, in a similar fashion to that of a credit card swipe.

"Hey, how'd your hookup on Grinder go?"
"Great. We Netflixed and chilled and he gave me cow tongue."

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