When we say someone is "more streetwise", we mean that they are knowledgeable about the ways of the urban world, especially in terms of crime and danger. Antonyms for this phrase would include words like naive, inexperienced, innocent, and gullible. These terms describe individuals who lack the skills and know-how to navigate city life and may be vulnerable to scams, theft, or other forms of victimization. While being streetwise can provide certain advantages, such as the ability to avoid danger and make shrewd decisions, it can also lead to cynicism and mistrust. The key is to find a balance between being savvy and being open and trusting.