eskeburdu
A very flexible word. It can be used to describe anyone or anything in a positive or negative way. What's more, it's so flexible that the listener won't really know what you mean.
Some girl: "Did you know? BTS just-"
Mark: "Shut up you, stupid koreaboo! You're so eskeburdu (annoying)."
Mark: "Shut up you, stupid koreaboo! You're so eskeburdu (annoying)."