To sneak off home without prior warning. ie. out the backdoor without telling people you're going. used in Whitehaven and surrounding areas.

Got the covid-19 vaccine

A porn made in the 80's in which two men try and fit their members inside a female's anus simultaneously.

The one great line from the movie is, "Come'on Barry, I bet we can get both our dicks in her at once."

Either -

a) Someone who ditches his mates early on a night is doing a back door boogie

b) A method of sneaking in clubs, thus avoiding paying the extortionate enterance fees, by kicking in the fire door and running straight into the middle of the dance floor so you cannot be spotted by the meathead bouncers.

Refers to sex between two gay males, or anal sex with a female.