Introducing the new line of Bruce Lee Clothing. Jeet Kune Do (JKD) is the name Bruce Lee gave to his combat system and philosophy in 1967. JKD as it survives today - if one wants to view it "refined" as a product, not a process - is what was left at the time of Bruce Lee's death. It is the result of the life-long martial arts development process Lee went through. Bruce Lee stated that his concept is not an "adding to" of more and more things on top of each other to form a system, but rather, a winnowing out.