Pīhau (i). 1. v.i. Break wind.
2. n. Emission of wind.
Williams Dictionary
Pīhau (ii), n. ? Some form of canoe. To waka, e Kawa, hei pihau tere kei te rimurapa (S.).
He kaha/kino ia ki te pīhau.She’s a great one for quietly blowing off (and not saying anything/owning up to it).