Definition of "grumpier" [grumpier]

• Comparative form of grumpy: more grumpy (adjective)

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• "In the snapshot poll of UK pet owners, PDSA found that 68 per cent of pets are "grumpier" in winter months compared with summer."
• "He was even grumpier this morning after reviewing video of his team's sloppy 4-2 defeat at Philips Arena."
• "Valentine's Day 2012, and America is grumpier than ever."