Pronunciation

change

Singular
grump

Plural
grumps

  1. (countable) (informal) A grump is a grumpy person.

Plain form
grump

Third-person singular
grumps

Past tense
grumped

Past participle
grumped

Present participle
grumping

  1. (intransitive) (informal) If a person grumps, they sulk and complain.
change