[know.your.why]

MS-13 IS El Salvador. MS stands for Mara Salvatruchas. 13 is the letter M which signifies Marijuana. They're also called Mara Salvatrucha Stoners.

[joshua c]

Additionally, the word mara means gang in Caliche and is taken from marabunta, the name of a fierce type of soldeir ant. “Salvatrucha” is a combination of Salvadorain and trucha, a Caliche word for being alert, usually entailing preparedness for crime or abuse from police

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the spelling errors are from the Urban Dictionary