When someone does something
great, amazing, or totally rad, but thru clumsy retarded
dumb-
assed means.
Man, that's forever going to be George's
bow-leggacy, he backed off that ladder and ended up saving all those old
people from that fire because he
cracked his head on that pile of old books which set off a chain reaction of events that lead to putting out the fire.
See also Curious George.