Soresnout

A poor sport, cynical person, braggart, snob, or brat. (Originated from the act of turning up one's nose in distaste, such as a snobbish child when served food that they do not want/like.)

Person 1: "This is so stupid. I quit!"
Person 2: "Oi, no need to be such a soresnout about it."

by the bees are coming February 15, 2018