When you cum in your pants while they are still on making a sloppy stank cookie in ya trousers!!!!

Big thing that looks like a big booger

Rhyming slang for retard

Oyster = Oyster Card = Retard

To stick your tongue in someone's nose during sex. (Like French kissing, but further north.)

when you cum in someones hand and they drink it down... much like an oyster...

Cunnilingus. Deep oral sex with a female on the receiving end. Generally excludes the clitoris and other external genitalia, focusing on the vaginal canal itself.