おはようございまっちゃう
お早うございまっちゃう
ohayōgozai macchau

Godan Verb (u)
Interjection

The completive aspect (contracted form) - indicates completion or regret of おはようございます

1. Good morning (and I'm embarrassed to say it); Good morning (and I regret saying it)

Completed Action
Colloquial
Usually Written in Kana