Mihimihi refers to the introductory speeches which take place at the beginning of a gathering or meeting after the more formal pōwhiri. Mihimihi are generally in Māori language and can be given by both males and females. The purpose of mihimihi is to establish links with other people present. It involves individuals standing to introduce themselves by sharing their whakapapa (genealogy, ancestral ties) and other relevant information.

From http://www.puketeraki.nz/site/puketeraki/files/images/Mihimihi%20resource_0.pdf