What does the russian phrase that sounds like "yo ma yo" mean in english?

A natural phenomenon

Explanation:

In “The Beginnings of the Maasai,” the daughter of the Maasai explains the relationship between the Maasai and their sky god Enkai. She explains how a volcanic eruption sent Enkai and the cattle into the sky. As a result, the cattle are sacred to the Maasai, and the Maasai maintain a close connection with Enkai