죽을걸

will probably die, is likely to die

→ 죽다
verb · informal Rare #29,554
will probably die, is likely to die A colloquial sentence ending used to make a confident prediction, sometimes as a warning.
KO: 오늘 밤 기온이 영하로 내려가면 식물이 죽을걸.
EN: The plants will probably die if the temperature drops below zero tonight.
Conjugation of 죽다

그럼 얼어 죽을걸

Then you'll freeze to death.

— 어느 가족 (2018)

이 정도로 죽을 놈은 벼룩 한테도 물려 죽을걸!

A guy who's going to die like this should die from a flea bite!

— 7인의 사무라이 (1954)

아버지 손에 잡히면 아마 죽을걸

If my father gets his hands on me, I’ll probably be killed.

— 리턴 (2003)