sorry for the stupid 질문 but, when someone calls 당신 boss, what do they mean?

i know i should already know this but i don't. i want to know because today at the fair me and my crush were hanging out, and i was rapping to myself, to some lyrics i made up, it went like this, "Hey, hey, yo ugly bitch. u be given me this freaky itch. u no u never gonna get his inch. cause lets face it, u ain't no fresh peppermint," and then my crush said, "Damn! your boss!" But i didn't want to ask him because i didn't want him to think i was stupid. so, what does it mean?