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One who misses a last second field goal in a the 2012 AFC championship, or in general fucks up under high pressure.
Ian:*shanks a field goal*
Ben: "Your such a Billy Cundiff"
by darrrrrrrrrrrrrrrrrrrrr January 22, 2012
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the worst kicker in the nfl and plays for the baltimore ravens. the ravens aren't in the superbowl because this bitch can't get a a field goal
Guy: you're kicking like a billy cundiff right now
by angryman13 January 22, 2012
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