すごいことになる

also: スゴいことになる

Meanings

1

expression, godan verb (-ru)

go crazy; get out of hand; end up in an extreme state

usually written using kana alone

Describes a situation or thing spiraling into an extreme, chaotic, or uncontrollable state. Often used in casual speech when something becomes wildly different from expected.

このまま放ほう置ちしたら、すごい事ことになるよ。
If we leave it like this, it's going to get out of hand.

彼かれが来くると、いつもすごい事ことになる。

Whenever he shows up, things always go crazy.

Written forms

すごい事ことになる
Mixed kana-kanji spelling; the expression is usually written in kana.
凄すごい事ことになる
Kanji form is rare and may be confused with the literal meaning of 凄い; the kana spelling is strongly preferred.
スゴい事ことになる
Katakana-emphasized variant, sometimes used in informal writing for stylistic effect.
スゴいことになる

Kanji

凄uncanny, weird, threatening
事matter, thing, fact

Similar words

大たい変へんなことになる
More formal and neutral than すごい事になる; used in both serious and light contexts without the casual, exaggerated tone.
えらいことになる
Kansai dialect equivalent; carries a similar meaning but is regionally marked.

Etymology

A set phrase combining すごい (amazing, terrible) with 事になる (to come to a state). The expression is idiomatic and its exact origin is uncertain; it likely developed from the emphatic use of すごい to describe an extreme outcome.