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1.
A girl who is over-all innocent and beautiful who has a playful side where she is never afraid to bring it out along with how she's especially and extremely strong and independent. Jaily is loyal, smart, capable of adapting, and she is a one-of-a-kind girl. She's simply amazing and will surprise you, over and over again. She's a tricky girl and will fight back at any moment unafraid of what may happen. Watch out for her because as strong an independent as she is, she can still get hurt. She will always have someone who watches out for her and unafraid to get dirty at the first sign of trouble for her. Jaily is a very understanding person and one of the most amazing people you will meet.
She is also brave, bold, and one of the coolest people.
person 1: Dude, your girl is too cool to be NOT hanging out with us!
person 2: Well, that's my Jaily!
by RickyT2 July 06, 2011
 
2.
To do something morally or ethically wrong, something that might result in jail time.
"Man, Steve got himself into some real jaily shit last night."

by CleverlyEleanor December 07, 2008
 
3.
Adjective. Descriptive of any illegal act of sufficient gravity that the perpetrator runs the risk of jail time; drunk driving, armed robbery, murder, possession with intent to distribute, etc.
"Knock over the Kwik-E-Mart? I dunno dude, that's pretty jaily."
by A wild Danimal January 09, 2008