heavy hitter

noun [C] informal

Definition

› a person or company that is very well known and has a lot of influence, or a product that is very successful: The group will soon unveil the appointment of some mining sector heavy hitters to its board. The proposed tax breaks have drawn the interest of some heavy hitters, including Goldman Sachs, which owns Horizon Wind Energy. Three heavy hitters were released last Friday, and should see Americans flocking to cinemas. → See also big hitter

(Definition of heavy hitter noun from the Cambridge Business English Dictionary © Cambridge University Press)