Rhinohide
From BelegarthWiki
1 (noun) usually disparaging: A person who’s skin is so thick that it is difficult for someone to score a hit, regardless if it was solid or not. Their skin is akin to the thickness of a rhino’s. Winfang isn’t taking anyone’s shot, he is quite the rhinohide.
2 (verb) usually disparaging: The act of ignoring a good shot. Winfang just rhinohiding my shost.