IPA: /ˈɡrʌm.pi/
KK: /ˈɡrʌm.pi/
Feeling or showing a bad temper or being in a bad mood.
He was grumpy after waking up early in the morning.
Comparative: grumpier
Superlative: grumpiest
Grumpy originates from the dialectal English word 'grump', which is of uncertain origin but likely related to the Old Norse word 'grumpa', meaning to grumble or complain. The word describes a state of being irritable or in a bad mood.
Think of someone who is 'grumbling' or complaining — that's what being grumpy means.