1. third person singular present of 'chirk'; to make a sharp, trilling sound like a bird or cricket
Usage: informal; chiefly British
2. third person singular present of 'chirk'; to cheer up or make cheerful
Usage: informal; chiefly British; often used with 'up'

Examples

• The cricket chirks loudly in the garden at night.
• She chirks up whenever her friends visit.
• The bird chirks a cheerful melody from the branch.
• A little music chirks him up after a difficult day.
• The insects chirk in the warm evening air.