bonnacon or bonacon - n., a mythical bovine creature with huge in-curving horns and caustic dung.
Specifically, medieval European mythology, though the first description is from Pliny (who called it a bonasus). Some stories say the dung is actively burning -- so, yes, a giant cow with flaming poop. Another alternate name is bonacho (used, for example, in the Golden Legend).

Thanks, WikiMedia!
Flaming. Poop.
---L.
Specifically, medieval European mythology, though the first description is from Pliny (who called it a bonasus). Some stories say the dung is actively burning -- so, yes, a giant cow with flaming poop. Another alternate name is bonacho (used, for example, in the Golden Legend).

Thanks, WikiMedia!
Flaming. Poop.
---L.