To purposely or accidentally not land a trick, such as a grind, grab, air, gap, spin, or flip. Term should only be used when referring to extreme sports with wheels, such as skateboarding, rollerblading, BMXing, and scootering.
"Damn skateboarders. Bailing all their tricks."
by Sonus December 12, 2003
To leave a group of friends, social gathering, or other such event with little or no warning or reason why. To bail.
Dude, I can't believe you're bailing already. It's not even midnight!
by J. Wolf April 16, 2005