—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. 1. an impressively successful or skillful and often vain person.
2. Railroads.an express freight train.
3. a firefighter. Also,hot shot(for defs. 4, 6).