The origin of this word is from the hit NBC TV show Bonanza a western series that ran from September 12, 1959 to
January 16, 1973.
Dan Blocker – Eric "Hoss"
Cartwright was a featured character and his demeanor and attitude was a kind and gentle soul for a really big guy. So now it has been used as a term of endearment of Brotherhood or Respect to a fellow person weather they are familiar with the person or not.