くすぶっちゃう
kusubucchau

Godan Verb (ru)
Godan Verb (u)

The completive aspect (contracted form) - indicates completion or regret of 燻る

1. to get smoked; to be smoked; to get burnt; to be burnt; to overdo (cooking); to be ruined (by smoke/heat)

Completed Action
Colloquial