adjective
- bad-tempered and irritable
Examples
- My grandfather gets grumpy when he’s tired.
- She was feeling grumpy after waiting in line for an hour.
- The grumpy old man yelled at the children to stay off his lawn.
- I’m always grumpy before I have my morning coffee.
- Don’t mind him – he’s just grumpy because he didn’t sleep well.
- The baby becomes grumpy when it’s time for a nap.