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1.
1. A person, place, or thing (aka NOUN) that habitually ruins/fails/destroys in some way. Used synonymously with crapper.

2. (verb) bumrucking - to fail to work, to ruin, or to royally fuck up a situation.
"My camera won't work again. This is the fifth time this week."
"What a bumrucker."

or
"It's a bumrucker of a car, doesn't even work half the time."
or
"You're such a bumrucking idiot, man. I can't believe you crashed your car into that fence post."
by aishothegreat February 10, 2010