The phrase "to stay frosty" means to remain alert, calm, and ready, especially in stressful or uncertain situations. The structure uses "frosty" metaphorically to suggest cold, controlled composure rather than emotional reaction. It is informal slang often used in military-influenced speech and action-oriented contexts. The expression encourages keeping focus and avoiding panic while staying prepared.

英語での「stay frosty」の定義と意味

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