Ready for action, especially for sexual activity. This somewhat vulgar slangy phrase dates from the mid-1900s. Bill Pronzini used it in a conversation between two characters about to attack a homosexual, “‘You ready?’ Bix giggled the way he always did . . . ‘Hot to trot’” (Nightcrawlers, 2005). With the sexual innuendo, it appeared in a 2002 article about a sexy award-winner: “Not only is she hot to trot on a night out, she’s spot on when it comes to the ‘less is more’ rule.”