This word is one of the universal Bantu words common in almost all Bantu languages with slight variations in pronunciation and spelling.
Here the Proto-Bantu reconstruction and many descendants: https://en.wiktionary.org/wiki/Reconstruction:Proto-Bantu/m%CC%80b%CA%8A%CC%81d%C3%AC
No. "mbuzi" is the animal. Goat meat is "nyama ya mbuzi", which literally means "meat of goat"