for this term that might be more appropriate for a formal setting?

Further viewing: For a deep dive, watch The Celluloid Ceiling (documentary), listen to the podcast “You’re Wrong About” – The Lady Episode, and compare the use of “ladies” in The Mary Tyler Moore Show (1970s) vs. Hacks (2020s).

“sexxxxyyyy” is an emphatic, elongated form of “sexy” used in informal text to stress attractiveness or sexual appeal. “Ladies” refers to women. So the phrase roughly means “very sexy women.”