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1.
When a person begins to speak about a subject and then works in the lyrics to a certain theme song, the origins of the term originate in West Philadelphia where I was born and raised, on the playground is where I spent most of my days, chillin' out maxin' relaxin' all cool and all shootin' some b-ball outside the school when a couple of guys who were up to no good, started making trouble in my neighborhood. Got in one little fight and my mom got scared, said you're moving with your Auntie and Uncle in Belair.

OH SHI- you just got belaired
by ShatBrickner March 20, 2008
 
2.
hooking a reader on to a particular story then replacing the climactic part with lyrics from the "fresh prince of bel-air" theme song.
She slowly unzipped her dress, as my throbbing hardon grew larger, she gently carressed it and my mom got scared
She said 'You're movin' with your auntie and uncle in Bel Air'. you've been bel aired.
by 564508441 March 12, 2008
 
3.
Used to refer to the act of following a video link purportedly offering proof of some act, only to find that the video in question is the opening credits to the 90's tv show "Fresh Prince of Bel Air"
"Dammit, I've been Bel Aired again"
by KevfromWow January 16, 2007