also: まったくもー
expression, interjection
good grief; for goodness' sake; honestly
Exclamation of exasperation, annoyance, or disbelief. Often used when the speaker is fed up with a situation or someone's behavior.
全くもう、また遅刻かよ。
Good grief, you're late again.
まったくもう、何度言ったらわかるんだ。
Honestly, how many times do I have to tell you?