idiot2578 Share definition Flag has a bad habit of chewing on their lips like Lin Manuel Miranda......cool in da inside but awkward taco:3 bruh moment on da outside Friend: r u ok??? do u ever stop being so sad 2nd Friend: i think i caught idiot2578 syndrome idiot2578 by coolgirlsyndrom33 July 17, 2020 Get the idiot2578 mug.