'Zǎ bàn' is an informal, spoken expression meaning 'what to do?' or 'how should we handle this?' It combines 咋 (zǎ), a northern Chinese colloquial variant of 怎么 (zěnme, 'how'), and 办 (bàn), meaning 'to handle', 'to deal with', or 'to manage'. Though it looks like a noun phrase, it functions as an interjection — often expressing urgency, helplessness, confusion, or mild panic in response to an unexpected or difficult situation.

This phrase is common in everyday speech, especially in northern dialects and informal writing (e.g., text messages or social media). It’s rarely used in formal documents or academic contexts. Speakers often use it alone as a rhetorical question ('Zǎ bàn?!') or embed it in sentences with subject pronouns or context clues ('他生病了，咱咋办？'). Its tone is conversational and emotionally charged — the speaker usually expects shared concern or collaborative problem-solving, not a literal procedural answer.