Did you know that the word in our Oppa and Heart Sticker is a Korean term typically used by a female to refer to an older male? In Korean culture, addressing someone by their appropriate title and honorifics is crucial to show respect and maintain social hierarchy. Oppa addresses older males they are close to, such as an older brother, a male friend, or a romantic partner. In some cases, it may be used by females to address an older male acquaintance or even a celebrity, expressing a sense of familiarity or admiration.