When someone thinks they live rent free in your head, make you pissed, or annoyed. Even though they really aren't important, they're nothing but another body on this earth you don't care about.
Person 1: hey, bitch you suck at *current thing you're doing*, be better hahaha.
Person 2: *ignores*
Person 1: hahaha i know you hate me right now, im pissing you off.
Person 2: *turns head* you're just a body, i dont care about what you're saying.