Etymology
Advertisement

big shot (n.)

"important person," 1929, American English, from Prohibition-era gangster slang; earlier in the same sense was great shot (1861). Ultimately a reference to large type of gunshot; see shot (n.).

Advertisement
Advertisement
Definitions of big shot

big shot (n.)
an important influential person;
he thinks he's a big shot
Synonyms: big gun / big wheel / big cheese / big deal / big enchilada / big fish / head honcho
From wordnet.princeton.edu