Gritty, underground street gang of the San Gabriel Valley east of Los Angeles. Known best for street racing, vandalism/street art, and random acts of meanness.
-Yo man, you see that dude's VI II VI tattoo on his ribs?

-Yeah man, he's 626 Mafia. He's a bad mutha
by InnesEmil July 22, 2011
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A street gang from the San Gabriel Valley. The organizations' colors are blue and black. Their main focus is getting money. Claims any area within the San Gabriel Valley. They often refer to themselves as "626xMF" and "Six Deuce Mafia."
That wall over there has "626xMF" written on it.

That guy has a blue and black bandana, he must be in 626 Mafia.
by a.ramirez April 21, 2021
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