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1.
To continue; to go ahead and carry out a task, particularly with enthusiasm

Origin: Portadown and maybe other parts of Co Armagh.
PhD student: Shall I repeat the experiment with a higher enzyme concentration?
Supervisor: Yip. Bail on.
PhD student: Okies. Dead on.
by UrbanBiochemist October 31, 2011
 
2.
Freaking bad ass dancer thats what.
Originates from the spanish word bilar meaning to dance. A Bailon is a slutty dancer. Fabulous, but slutty.
That Bailon in the club last night was smokin.
by sonaaaaaa August 25, 2008