A goat whose surrogate mother was a crocodile that felt guilty about eating the goatling's mother, thus allowing the little goatling to suckle on it's croc-teets and raising it as one of it's own... ...and the Crocagoat was born.
*Derived from the Arseblog Arsecast Episode 78, "The Sacking..."
I drank the blood of a crocagoat to cure my ailments and to renew my mojo.