someone who isnt just an ordinary fangirl. they know everything about the show/fandom/actor/actress/writer/ etc.
fanqueens generally do not behave like normal girls.
they tend to gasp a lot and say things which only other fanqueens understand.
if you ever try to insult their fandoms/otps, you'd have better written out your will

A casual invitation / threat used by an individual that is not afraid of fucking someone up.