From Longman Dictionary of Contemporary Englishbig shotˈbig shot noun [countable] informalPOWER someone who has a lot of power or influence in a company or an area of business His father’s a big shot and he thinks he is, too.
Examples from the Corpus
big shot• He will be a big shot one day, she thinks.• a media big-shotbig shotbig shotIMPORTANTan important or powerful person, especially in business a big shot in the record business → shotExamples from the Corpus
big shot• He will be a big shot one day, she thinks.• I gave my opinion but, of course, it was a big shot so early in the game.• You see, all the artists wanted to be big shots.• Among Western Conference big shots, only San Antonio seems trouble-free right now.• a meeting of insurance-industry big shots• This is a matter between the big shots.• And they used to race some of the big shots in New Bedford.• Malone, however, choked when it came to making his two biggest shots of the game. 