However, it's important to understand the context and nuance of the phrase. It's often used in these ways:
1. Casual Conversation: Similar to "What's up?" or "How are you?" It's a friendly way to start a conversation or check in with someone.
2. Rhetorical Question: It can be used as a way to express frustration or annoyance, meaning "What do you care?" or "What business is it of yours?"
3. Sarcastic Tone: It can be used sarcastically to imply that the other person is nosy or overly concerned.
4. Challenge or Confrontation: It can be used to challenge someone, meaning "What are you going to do about it?"
The meaning is heavily dependent on the situation and tone of voice. Pay attention to the context and the speaker's body language to understand the intended meaning.