One who loves to view the grace, beauty and dedication of the physical accomplishments of Eastern or Western combat arts, without being bothered to actually do any of it, yet still knowing a great deal on the subject.
Could possibly be called a Partial Artist or Chair Boxer.
Someone who enjoys others who fight while they sit, one who has mastered Bum Fu.
A lazy Fight Fan.
Bloke 1: Your mate knows alot about martial arts, girl...
Lady 1:Oh, dude, he's an Armchair Martial Artist who has mastered Bum Fu.