Top Definition
a high school gang created in the 2000s by a group of italians, but it has many different races involved. they rep green, north-east, and the number 33, they originate from the town of Manteca, but is estimated to be the most popular gang by 2030, evan passing up bloods and crips.their rival gang is the purps/purpanos, and the alltanos.
if you mess with him he'll get the GREENTANOS on you.
by ninjagideo69 November 20, 2009
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