hot dog \hot" dog`\ (h[o^]t" d[add]g`), n. 1. A frankfurter. [PJC] 2. A sandwich consisting of a hot dog inserted in a partly split elongated roll, usually garnished with mustard, and sometimes also with relish, sauerkraut, or a pickle. A hot dog garnished with a chili mix is called a {chili dog}. [PJC] 3. A person who performs a complex and difficult athletic maneuver, usually to show off his/her skill. [PJC]