What is flat is justice?

"Flat is justice" is a phrase popularized by anime and manga fans, particularly those who appreciate the character design of female characters who have small or flat chests. The phrase advocates for the idea that a woman's worth or attractiveness should not be based on the size of her breasts. It promotes the acceptance and appreciation of all body types, and discourages objectification and body shaming. The phrase has become a meme and catchphrase in the online anime community.