1 definition by Leviathan Porkchop
The term used when two people of any sex create a tunnel by pressing their bare bum cheeks together, usually for the purpose of a third male party to insert their penis for sexual pleasure.
“Ryan rang at lunchtime to invite Mike and i round tonight for a bum tunnel and a curry”
George “Would you like my wife and I to bum tunnel you?
Me “no”
George “Would you like my wife and I to bum tunnel you?
Me “no”
by Leviathan Porkchop June 25, 2021
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