Vexivore

An organism that is inclined or predisposed to consume flags as food.

(from the Latin vexillum for flag and vorare for devour or swallow)

Bro 1: "Ay you know that chick Torple you were talking about? I'm pretty sure she's a vexivore."

Bro 2: "Oh hell yeah bro, I think I'll ask her out to eat flags with me!"