(kei) Mahurangi
1. way off track, way off beam, away with the fairies, lost the plot - an idiom to suggest that someone's thoughts have gone a long way from the issue or that they don't understand the real meaning of what they're saying.
E hoa, kei Mahurangi kē ō whakaaro e haere ana. Hoki mai ki te whenua, kia ū ki te kaupapa (HKK 1999:163). / Hey mate, you've gone way off track. Come back to earth and stick to the topic.