The line comes from Diary 31: Humiliation, part of the online diary series associated with Dax Flame and shared in clips tagged Mintman. In that context it was a sincere recap of a bad day, but isolated as a short sound it became a reusable punchline for cringe. Creators pair it with facepalm moments or a sad violin sting to underline secondhand embarrassment. Its popularity comes from how plainly it sums up a feeling everyone knows, so it still works for school, work and social fails.