What does it mean when a girl grinds on you?

When a girl grinds on you, it typically indicates interest or attraction, often expressed through a physical and rhythmic movement of her body against yours. This behavior can suggest she is comfortable and wants to engage in a flirtatious or intimate interaction. However, it's essential to consider the context and her body language to fully understand her intentions, as comfort levels can vary widely among individuals. Communication is key to ensuring mutual consent and understanding.