wax on

wax on (third-person singular simple present waxes on, present participle waxing on, simple past and past participle waxed on)

1. (intransitive, often followed by about) To discuss a particular topic at length.

   Synonyms: carry on, carp

   • 2023 July 6, Ali Trachta, “‘And Just Like That …’ Season 2, Episode 4 Recap: Vivante”, in The New York Times‎:

     She sends the documentation Carrie’s way by text while — of all times — Steinem is waxing on about the new frontier of feminism.