SAPPHIC (NMLNM)
"what does wlw mean?"
WLW is an acronym that stands for either woman-loving-woman or women who love women. It's used by the LGTBQIA+ community for a relationship involving two female presenting people. The term wlw includes lesbians especially, bi women, pan women, fem aligned nonbinary people, and etc.
(nblw is also a term used to refer to nonbinary people who like women since some enbies don't feel comfy using wlw to refer to themselves)
Another term sometimes used to refer to them is sapphists, but not all sapphics like to use this term as it's derived from "lesbo".