Grumpy mood Crossword Clue

 The answer to the grumpy mood crossword clue is SULLEN.

The word "sullen" means to be in a bad mood or to be gloomy. It can also mean to be silent and resentful. Someone who is sullen may be withdrawn and uncommunicative.

Here are some other words that can be used to describe someone in a grumpy mood:

Cranky

Irritable

Grouchy

Grumpy

Sulky

Sour

Testy

Irascible

Ill-tempered

Cantankerous

I hope this helps!