Top Definition
term I first herd used by Matt Hoffman a Nose Bone is a term BMS's use when banging the front wheel of their bike into whatever surface they were heading for with not so great results i.e broken/bent wheel or body parts faceing the wrong direction
Whoa!! Dude totaly took a nose bong on that one..

yeah I was on my way down when BAM nose bonged straight into the rail GODAMIT #*@"!!#@"?*#?
by ian November 30, 2004
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