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2 definitions by ahay!

 
1.
The condition that one gets into, after having been camped out in, and therefore exposed to, the elements for several days, and having consumed considerable amounts of alcohol at a summer festival or show.
Look at ............ he's been here all weekend, and has achieved Muddyhell

Or

Try to ignore...... he's gone to Muddyhell

Or

Muddyhell!
by ahay! July 12, 2010
 
2.
The art of getting drunk, then lost, at a show or festival. Eventually turning 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
by ahay! July 12, 2010