Bail Mary is a term used in parkour and free running for when some one not only fails to pull off a move or trick, but fails in such a way that is both painful and comical.
Dude, i tried to do a frontflip to cat the other day but i misjudged it and face planted into the ground.

Ouch, don't you hate it when you bail mary?
by bailmary February 11, 2011
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