When you have contempt, rarity from my little pony did it ask her too if you want a good definition
It is also a term a spoiled brat or snobby rich person would use when they think they have been treated in a way that is absolutely unacceptable!
Random rich snobby person #1: Well I never! Humpha!
Random rich snobby person #2: Harumph! *adjusts monocle*