Green’s Dictionary of Slang

1. eager for action, involvement.

1952		Leatherneck (USMC) 35 32: [A]ccording to Marine Corps Special Services, the men are hot to trot when the [hunting] seasons open.
1958		(con. 1950) E. Frankel Band of Brothers 165: Had to sit on the gooks. They was hot to trot.

2. sexually aroused.

1960		‘Andrew Shaw’ Adulterers 97: ‘Poor little George who gets his kicks watching. Poor little George who can’t get his wife hot to trot’.
1972		B. Rodgers Queens’ Vernacular 69: drove up sexually excited, ‘hot to trot.’.
1986		L. Heinemann Paco’s Story (1987) 12: The snazziest, hot-to-trot honeyfuck to hit the mainland since the first French settlers.
1994		M. Ribowsky Don’t Look Back 166: Satch was tempted [...] by bagging the woman who was supposedly hot to trot with the best Negro ball had to offer.
2020		(con. 1991-94) W. Boyle City of Margins 126: ‘You still with that hot-to-trot number?’.