grumpy
adj. B1 Intermediate US //ˈɡɹəmpi// UK //ɡɹˈʌmpi// grumpy
adj. feeling or acting slightly angry and unhappy. You might feel this way if you are tired or if things are not going your way.
adj. easily annoyed or irritable; having a bad temper. Often used to describe a temporary mood or a person's general disposition.
He is always grumpy in the morning before he has coffee.
The long flight and lack of sleep made the children very grumpy by the time we reached the hotel.
Despite his reputation for being a grumpy old man, the shopkeeper was surprisingly generous whenever local charities came to his door for donations.
From grump + -y.
Usage
Often follows linking verbs like 'feel', 'seem', or 'look'.