Grumpy
Definition 1 of 1
Pro Tip 1/3
Negative Emotion
Grumpy suggests a temporary mood, not a permanent trait, often due to specific reasons. He's not always so grumpy; he's just tired today.
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Not Serious
Grumpy can imply a less serious, more tolerable level of annoyance than outright anger. She gets grumpy before her morning coffee, but it passes quickly.
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Informal Usage
The term 'grumpy' is informal, so use it in casual conversations rather than formal contexts. My little brother is grumpy when he doesn't get enough sleep.