Lyric discussion by Alberick 

Cover art for Big Black Bull Comes Like A Caesar lyrics by Munly And The Lee Lewis Harlots

Judging from the title and the verse:

"I was a breach born son, I come backwards."

I believe that the narrator was born by Caesarean section.

It probably was regarded extremely unnatural at the time when the story's set, thus, his brother used an insulting word to refer to both the narrator, and later on, the calf which was born the same way.

My Interpretation