nach
A nache is someone who thinks they're the best, but they're just a self-proclaimed Queen Bitch who can't take criticism.
"She’s a nache and thinks she’s the Queen of the World.", @QueenBitchFan
"He called me a nache, and I took it as a compliment.", @SelfProclaimedQueen
"A nache is someone who gets mad when they get a B.", @SchoolRival2