Tough cookie means a strong, resilient, shrewd, or difficult person who can withstand pressure. In poetry, the idiom combines toughness with a surprisingly domestic and affectionate image, making it useful for character portraits. It can describe a grandmother, child, worker, fighter, or survivor whose strength appears in ordinary life. A poet may use it warmly, humorously, or admiringly. The phrase is useful because it softens hardness without denying it, showing resilience as practical, human, and sometimes unexpected.

A tough cookie is a resilient, strong-minded, or difficult-to-intimidate person. The idiom is informal and affectionate, often softening admiration with humour. In poetry, it can characterise a survivor, sharp elder, determined child, or stubborn lover. The food image contrasts sweetness with toughness, making it useful for complex portraits. Students should ask what made the person tough and whether the phrase hides pain behind charm. It pairs well with kitchens, heat, and resilience.