stacking breaks

An old saying in the stand-up comedy world, typically used as a way to brag about how well one did in their stand-up set. Can also be used as a way of casually bragging about how well one does something more generic. Frequently shortened to "stackin'" or "stacking" or "stacked."

Elliott: Mike's killing it up there, he's stacking breaks!

Steve: I fucking stacked tonight, man.