Kore wa hidoi is a common Japanese phrase meaning this is awful or this is terrible, and online it has become shorthand for reacting to a scene that has gone badly wrong. The short spoken version circulates on soundboards and in edited clips because the meaning is clear even to viewers who do not speak Japanese, helped by tone alone. It is often paired with fail videos, bad reveals and awkward moments, where a brief foreign-language verdict feels funnier and less harsh than a long English rant.