According to multiple sources, "Champagne confetti" is a phrase used in the song "3D" by Jungkook and Jack Harlow to symbolize something special and celebratory, combining the luxury of champagne with the festive spirit of colorful paper confetti often seen at joyful events. The phrase is used to describe the idea of meeting someone they care about in person and wanting to make it feel like a big, joyful celebration when it happens. It is important to note that there is one source that suggests "Champagne Confetti" is slang used in English to refer to female ejaculation. However, this interpretation is not supported by any other sources and is not consistent with the celebratory meaning of the phrase in the context of the song.