The art of getting drunk, then lost, at a show or festival. Eventuallyturning up some hours later with dirty feet, a pocket full of traders business cards, and no memory of how or why.
Where's .......?
No idea he's gone completely battlebus.
Or
Have you seen ........?
Nope he's gone Battlebus last I time I saw him he was tucking into a colostomy bag of wine
Or
Don't worry about ................ he's gone Battlebus again