hotshot

• POS: Adjective, Noun
• HYPHEN: hot=shot

CIDE DICTIONARY

hotshot, n. 

 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]

hotshot, a. 

•  highly talented, self-confident and successful.  [PJC]
•  flamboyantly displaying one's skills.  [PJC]

OXFORD DICTIONARY

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