the.com/bigshot

means An important or powerful person, especially one who acts self-important about it.

from An American coinage from the early 20th century, pairing 'big' with 'shot' — 'shot' having long served as slang for a notable or capable person (as in 'a big shot of a lawyer'), itself possibly tracing back to marksmanship, where a good 'shot' was someone who hit the mark and earned respect. By the 1920s, 'big shot' had settled into its modern sense: a person of importance, often one who makes sure you know it, frequently applied to gangsters, bosses, and anyone trading on real or imagined clout.