Green’s Dictionary of Slang

hot pants adj.

[hot pants n.]

1. sexually eager.

[US]K. Nicholson Barker II ii: You hypnotized him into thinkin’ he loves you. Then when you had him all hot pants you married him.
[US]J.M. Cain Moth (1950) 213: Hot pants, cold heart.
[US](con. 1940s) M. Dibner Admiral (1968) 356: Those poor little neglected hot-pants Navy wives.
[Aus]D. Williamson What If You Died Tomorrow (1977) I i: You had the hottest pair of pants in the colony.

2. sexy, provocative.

[US]C. Cooper Jr Weed (1998) 229: You just take off that hot-pants dress and whore face.