noun / verb
grump
GRUHMP/ɡrʌmp/
An irritable complainer or such complaining behavior.
The repeated sour reactions suggest she is a habitual grump.

Etymology
Grump first referred to ill humor or surly remarks, then to a person displaying that mood. It may extend grum, “morose, surly,” or have been suggested by words such as grumble and grunt.
In context
Oh, don't be such a grump. Enjoy the show love.
More examples
- She grumped about the delay throughout the drive.
- The old grump complained even when the weather was perfect.
- They ignored his grumping and continued the game.
Forms
grump · grumps · grumped · grumping
grumpy adjective — irritable or inclined to complain
Similar words
- grouch
- Grouch is a close equivalent for an irritable person; grump also readily names the act of complaining.
- complainer
- A complainer voices dissatisfaction; grump implies a habitually sour disposition.