Humph vs. Hmph: What's the Difference?
Humph and Hmph Definitions
Used to express doubt, displeasure, or contempt.
(onomatopoeia) A sound, usually made with a closed mouth pouting, indicating annoyance, indignation, disapproval, doubt, or sighing.
(intransitive) To utter "humph!" in doubt or disapproval.
An exclamation denoting surprise, or contempt, doubt, etc.