grumpy

Meanings

1. 1
   adj

   easily annoyed, bad-tempered, and inclined to complain

   He becomes grumpy when he has not had enough sleep.

2. 2
   noun

   an irritable or habitually complaining person

   Even the office grumpy smiled when the lost dog was found.

Formed from grump + -y. Grump first denoted a surly mood or a fit of ill temper and is probably imitative of muttering or a low, dissatisfied sound.

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