The disease of boanthropy is most famous because King Nebuchadnezzar (supposedly) became inflicted with this until he learned to recognize God's glory. (It took him seven years).
See Chapter 4 of Daniel.
"The same hour was the thing fulfilled upon Nebuchadnezzar: and he was driven from men, and did eat grass as oxen, and his body was wet with the dew of the heavens, till his hair was growen like eagles' feathers, and his nails like birds' claws."
The greek prefix bo- indicates cowness, as in Bovine and Boopic.
A type of Zoanthropy or Lycanthropy.