bum box
noun - a less expensive pack of cigarettes used by a smoker to give to a smoker who is out of cigarettes, so you won't have to give out of your precious more expensive higher quality pack of cigarettes
Oh! You cannot have one of my American Spirits, but you can have one out of my bum box of Basics.
bum boxing
Where two men, usually gay, decide to take part in a spot of boxing, but instead of fists they use one guys bum hole and the others guys erect cock.
"Barrie is looking very tired today" "Yeah, i heard he was up all nite with Higgie from accounts bum boxing".
bare bum box
To make love
When 2 adults love each other very much, they “bare bum box”