Dac that - It's a way to say you don't actually care, like you're just

It's a way to say you don't actually care, like you're just pretending to be interested and you're ready to move on to the next thing.

'Dac that' when your friend texts you 'what's up?' and you're just going to ignore it.

'Dac that' when your teacher asks if you finished your homework and you just say 'I don't care.'

'Dac that' when your mom says 'you're going to clean your room' and you just say 'okay' and then do nothing.