The phrase combines two common Brazilian slang expressions, ngm liga, short for ninguem liga meaning nobody cares, and ta ligado, a filler similar to you know or are you following. Clips using everyday slang like this spread mainly through WhatsApp groups, short video edits, and soundboards, where a short spoken line becomes a reusable reaction. Its appeal is less about a single source and more about tone, so Portuguese speaking creators keep reusing it whenever a conversation needs a blunt, funny shutdown.