Can't talk now, what's up? Meaning in Hindi

Let's divide the sentence to understand the grammar:

1. "Can't talk now"

   • Translates to: "Main abhi baat nahi kar sakta/sakti."
   • It literally means you are currently busy (maybe in a meeting, driving, or in a noisy place) and physically cannot speak on a voice call right now.

2. "What's up?"

   • Translates to: "Kya chal raha hai?" or "Kya kaam hai?"
   • In this context, it is a casual way of asking the caller, 'Why did you call me? Please tell me the urgency via text message.'

This is an informal message. You should use it when a friend, sibling, or close colleague calls you while you are busy. Sending this message tells them: 'I am busy and had to cut your call, but you can text me the reason right now and I will read it.'

Because the phrase "what's up?" is highly casual slang, you should never send this auto-reply to a boss, a client, a teacher, or an elder. If your boss calls and you are busy, a much more polite and professional English message to send is: "I am in a meeting right now. Can I call you back later?"