What does すっごい mean?
すっごい is a Japanese adjective meaning “terrible; dreadful” in English. It can also be translated as “amazing (e.g. of strength), to a great extent” depending on context. It is written as すっごい in hiragana, and suggoi in romaji. This word is part of JLPT N2 vocabulary.
Example sentence
すっごくいいものを見つけたよ！
I've found something amazing!