しどいしどいConjugationMeanings1i-adjectiveawful; terrible; dreadfulslangSlangy, emphatic version of ひどい. Used in casual speech to express strong negative judgment about a situation, person, or thing.See also: ひどい昨日きのうのテスト、しどい点てん数すうだった。I got an awful score on yesterday's test.