The clip circulates on meme soundboards under the full phrase not a fluke I got the goop, usually shortened to just goop in tags and searches. Its exact source is not widely documented, so its popularity comes from how the line is used rather than a known scene. Creators reuse it as a standalone brag for rare pulls, repeat wins and unlikely successes, where the strange wording does most of the work. The short four second length makes it easy to drop into edits without setup or explanation.