Re: Brawler, Fighter of MA ?
most brawlers and fighters could kick most martial-artist's butts? 
okay, I'll be serious for a second...
My definition of the term "brawler" is the guy that goes out and tries to get into fights just for the heck of it, or because he enjoys it, or whatever. When I hear the term "fighter," I think of a professional athlete like a boxer or MMA competitor who uses their training in the ring. Martial-artist, in my mind, means someone who studies the martial-arts (of any type: empty-hand, firearms, etc.) on a regular basis.
That said, "fighters" are martial-artists as well and I guess brawlers technically could be (presuming they train) if we go with my rather literal definition of the term martial-artist.
The test: "Will this work so that I can use it instinctively in vital combat against an opponent who is determined to prevent me from doing so, and who is striving to eliminate me by fair means or foul?" ~ Col. Rex Applegate
Matt K.