Top definition
verb

(1)To failbox is to fail or mess up something in a huge way.

(2)To be a failboxer is to be someone who failboxes.
(3) to beatbox horribly
(1)"Yo man i saw you trip down those stairs. You totally failboxed right there"
(2)"shut up you're such a failboxer"
(3)"Dude, that was not beat boxing. That was failboxing."
by winteroiceo February 25, 2010
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