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.
3.
A person who performs a complex and difficult athletic maneuver, usually to show off his/her skill.
... just as though she was at home in them," said Laura drawlingly. "I tell you she is a regular cowgirl at home on the Hot Dog Mesa. ... — Nan Sherwood at Rose Ranch • Annie Roe Carr
... one evening when Ted was home from the university, and Ted chuckled, "What's this I hear from Euny, dad? She says her dad says you raised Cain by boosting old Seneca Doane. Hot dog! Give 'em fits! Stir 'em up! This old burg is asleep!" Eunice plumped down on Babbitt's lap, kissed him, nestled her bobbed hair against his chin, and crowed; "I think you're lots nicer than Howard. Why is it," confidentially, "that ... — Babbitt • Sinclair Lewis