Brother-dad 

A rare occurrence wherein a son sires his own sibling of a close age.

"Hey man, you know when we were growing up and you wanted to know who your dad is? Well I fucked mom. Yeah, I'm your brother-dad."

Brother-dad by Stabyourself September 25, 2011

brotherdude 

When a man is both your bro and a dude he may be referred to as brotherdude. And don't even think about adding a space between the two or you certainly aint a dude, brother.

"How's it going brotherdude?"

Do not get confused with, "Isn't that your brother dude?"

brotherdude by A bro of a bro of a dude November 12, 2013