hotshot(n = noun.person) ace, adept, champion, genius, maven, mavin, sensation, star, superstar, virtuoso, whiz, whizz, wiz, wizard - someone who is dazzlingly skilled in any field;
is a kind of expert
has particulars: track star

   a successful, self-confident person who is regarded by others as highly skilled; -- sometimes used ironically in reference to aggressive persons whose opinion of their own talents is considered exaggerated. [PJC]

1.  highly talented, self-confident and successful. [PJC]

2.  flamboyantly displaying one's skills. [PJC]

hotshot, n. & adj. esp. US colloq.
--n. an important or exceptionally able person.
--adj. (attrib.) important, able, expert, suddenly prominent.