This implies ignorance towards someone, specifically someone who has experiencesomething bad, therefore in response one says ‘do yall hear summ’ to show they don’t care.
Just another way of saying "what are you guys doing today?" Usually said between you and your homeboys. They get it. Say it to your parents and they're just gonna say "We're not sitting on anything....what are you talking about Jimmy?"
What's up fam? What yall on for today? Y'all tryna cop a bottle of Jameson and drink til out livers go to shit?"