きちゃった

ended up coming, came (and did so unintentionally or regrettably)

→ 来る

き come; arrive + ちゃっ Completive aspect (often with a sense of regret) + た Past tense

auxiliary · informal, past tense Rare #26,434

ended up coming, came (and did so unintentionally or regrettably) Colloquial contraction of きてしまった. With another verb, it can express that something happened unintentionally or with regret; with an intransitive verb, it can also describe something beginning or developing.

JA: 傘を忘れてきちゃった。

EN: I ended up forgetting my umbrella and leaving it behind.

Conjugation of 来る

くるきますこないく来てきてるきそう

Past

来たきちゃった

持ってきちゃった

I ended up bringing it.

— तुम्बाड (2018)

急に体重が増えてきちゃったんだよ。

I've suddenly started gaining weight.

バスに傘を忘れてきちゃったかも。