What is the meaning of this sentence?
«지금 니 여친 어떤애랑 싸운다»

Question

Answer

지금 니 여친 어떤애랑 싸운다 -> 지금 네 여친(이) 어떤 애랑 싸운다.
(네 여친 = 네 여자친구 = your girlfriend;  어떤 애 = someone - '애'(아이), originally "kid", also means "a (young) person")

The meaning is as manybuddies says: Your girlfriend is quarreling with somebody now.

Answer

I'm guessing, "Your girlfriend is quarreling with somebody now."