Mbuʼ, or Ajumbu, is a Southern Bantoid language of Cameroon.
It is traditionally classified as a Western Beboid language, but that has not been demonstrated to be a valid family.
Inasmuch as Western Beboid may be valid, Mbuʼ would appear to be the most divergent of its languages.
There are three tones; high, mid, and low.
This article about Southern Bantoid languages is a stub.