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1. (Past Tense) The act of a physical failure, i.e. fall, trip, crash. Especially used when biking, running, skiing, snowboarding.

2. "Doofed Her" could totally have sexual connotations as well.
1. Colin- That was a sick ride!
Thomas- Did you see me back there? I almost Doofed 'er!
Colin- Yessadahbub.

2. Dude, I Doofed that chick last night.
by 1234yahooilagans October 26, 2011