이 떨어졌어

fell; ran out

→ 이
phrase Rare #21,378
fell; ran out The meaning depends on the subject: a physical object can fall, while a supply such as alcohol or fuel can run out. The ending -어 is informal and conversational.
KO: 마농, 방금 빗방울이 떨어졌어!
EN: Manong, a raindrop just fell!

마농, 방금 빗방울이 떨어졌어!

Manon, it just rained!

— 마농의 샘 1부 (1986)

이 떨어졌어

We're out of alcohol.

— 행복한 라짜로 (2018)