What is oppai?

"Oppai" is a term from Japanese pop culture that refers to breasts. It is often used in anime, manga, and other forms of media to describe a character's busty or well-endowed chest. The term can also be used playfully or humorously in casual conversations. It is important to note that the term may be seen as objectifying or sexualizing women, so it is advised to use it with caution and respect.