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Term originating from Eton Public School, circa 1964 by the victims of an act of buggery, (usually whilst one is asleep).
"Oh my God, I think I've been bummaged"!!!
by daventry September 22, 2007
bummage another word for bum.

also to be bummaged .. to be under the influence or illegal narcotics

to bummage someone ... exactly as it sounds.
bummage oot

i am completly bummaged
by worzsel bummage March 17, 2004