In case anyone’s interested, I found this pretty darn good-looking Latin translation site with a pretty darn interesting discussion on what was really “said” in the bottom-residing clip.
(Latin translation site): You’re not so bad yourself, big boy.
Oh, I bet you tell that t- NYAH!
Anyhoo, you may find this informative and/or interesting, as it shows that in Latin the “literal” translation isn’t always the “literary” translation.
http://latindiscussion.com/forum/latin/latin-conversation-in-the-movie-tombstone.6909/
10/16/16: FAIR USE: CRITICISM – Good scene from an ok movie. (housekeeping)