Noun: a professional skilled in the exquisite art of burrito assembly. The masculine equivalent is "burristo."
Burristas are charged with the task of warming the tortilla, filling, and wrapping the burrito.
Burrista: Sour cream and cheese for you, sir?
Customer: Yes, both please.
Customer 1: Damn. I hate when I get this burrista.
Customer 2: Why?
Customer 1: Bitch always skimps on the guac.