mahia atu/e mahi ([koe]) i [tō] mahi
1. get on and do it then, go on then do it - an idiom used as a command to get on and do something. Also used to imply that the speaker does not support the action or want be a part of it, or it is a warning to the person not to do it.
Ka haere tātou ki te kēmu, nē? Mahia atu kōrua. Me noho au i te kāinga whakaoti ai i ētahi mahi. / Let's go to the game, shall we? You two go. I had better stay at home and complete some jobs.