The combination is straightforward: the action of eating (吃) applied to a meal (饭).
In Chinese culture, eating is rarely just about sustenance; it's a deeply social and communal act. The phrase 吃饭 (chīfàn) carries significant cultural weight beyond its literal meaning.
The usage of 吃饭 is versatile and depends heavily on the context.
When used as a greeting, 你吃饭了吗?(Nǐ chīfàn le ma?) doesn't require a detailed answer about your food. A simple, positive response is usually best. It's most common around mealtimes and is considered a warm, friendly check-in.
Inviting someone to 吃饭 is a significant social act. The phrase 我请你吃饭 (Wǒ qǐng nǐ chīfàn), “I'll treat you to a meal,” is a common and important way to show hospitality or initiate a deeper connection.
In its most basic form, 吃饭 is just a neutral statement of fact about the act of eating.