/hot"shot'/ , Slang.
adj.
1. highly successful and aggressive: a hotshot lawyer; a hotshot account exec.
2. displaying skill flamboyantly: a hotshot ballplayer.
3. moving, going, or operating without a stop; fast: a hotshot express.
n.
4. an impressively successful or skillful and often vain person.
5. Railroads. an express freight train.
6. a firefighter.
Also, hot shot (for defs. 4, 6).
[ 1595-1605; HOT + SHOT 1 ]