Means gay. "iron hoof" rhymes with "poof" which is a derogatory term for a gay man. Iron hoof gets shortened to "iron" so if a bloke refers another bloke as an "iron" he is calling him gay
Umm 'bestest'? That's something a child would be saying. As far as best nickname goes? Look no further than Dewayne "Mr Stop Running" Beamon.
There was one that always stuck in my head that I loved. It was an early career fight of Dwight Hawkins where he fought a dude named Tomahawk Turner. Just loved that one.
Yeah a lot of fighters with first names named James have nicknames. Bonecrusher Smith, Buster Douglas, Quick TIllis, Broad Axe, etc.
Friday "The 13th" Abunayaha (I butchered that last name) Edit: here he is https://en.wikipedia.org/wiki/Friday_Ahunanya