“And I oop” is widely associated with drag performer Jasmine Masters, who said the line in a 2015 video. The clipped reaction spread years later through stan culture, meme edits and the VSCO girl trend, becoming a staple on TikTok and short-form video. People use it when something goes wrong, when a reveal lands awkwardly, or when a clip needs a fast comedic interruption. Its lasting appeal comes from how instantly recognizable and easy it is to drop into almost any reaction edit.