>>58080836Actually, per a link on the /ic/ thread, no it genuinely refers to lolis in their early teens, so Marnie, Lillie, Dawn, but also the Matoba Risa's and Shinobu Oshino's of the anime world along with characters of similar body type regardless of age. I do find it extremely weird like most people, and funnily enough I see it used here the most.
I should also mention a fair chunk of Gen Z women, even some in their middle 20s here where I live have Marnie's bodytype.