adj
grumpy
GRUHM-pee
adj
1
Easily annoyed and bad-tempered.
"He's always grumpy before he's had his coffee."
"The grumpy old man shouted at the kids to keep off his lawn."
How to Use Grumpy
Learner’s notesIn plain EnglishIn a bad, irritable mood.
Common pairings
grumpy mood
feeling grumpy
Word Forms
grumpier comparative, grumpies plural, grumpiest superlative
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Etymology
Formed from grump plus the adjective-forming suffix -y.