Something for nothing, and usually said with that proper Yorkshire squint that means stop being daft. It’s a warning that a bargain that looks too good is probably got a catch, or someone’s trying it on. You’ll hear it most in the full line You don’t get owt for nowt, which is basically Northern finance advice in one breath.
"Gaz says he’s won a free holiday off Facebook. Mam rolls her eyes, goes you don’t get owt for nowt, then checks the link."