A British-inflected intensifier combo meaning a failure so complete and spectacular that it goes beyond ordinary incompetence into something almost impressive. Not just dropping the ball — dropping it, tripping over it, and somehow landing on a second ball you didn't know was there. The word 'proper' here works as a maximiser, confirming there's nothing partial about this disaster. Used affectionately as often as critically, because a proper fail at least has the virtue of being thorough.
Tried to parallel park in front of my ex and it was a proper fail — took seven attempts and still mounted the kerb.
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Viral internet speak — memes, ratios, main-character moments, and the algospeak of every platform from Twitter to Reddit to TikTok comment sections.
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