Real Dictionary

hot dog
countable noun: A hot dog is a long bread roll with a hot sausage inside it.

hot dog in American English
a frankfurter or wiener, esp. one served hot in a long, soft roll, with mustard, relish, etc.
noun: a frankfurter

hot dog in British English
noun: a sausage, esp a frankfurter, served hot in a long roll split lengthways
verb: to perform a series of manoeuvres in skiing, surfing, etc, esp in a showy manner

hot-dog in American English
a person who hot-dogs; showoff
designating a form of freestyle skiing that involves acrobatics
to perform, esp. in sports, so as to attract attention; show off
adjective: skillful or excellent, as in sports performance
intransitive verb: to perform unusual or very intricate maneuvers in a sport, esp. surfing or skiing

hot-dog in British English
to perform a series of manoeuvres in skiing, surfing, etc, esp in a showy manner