Secretary of Defense under G.W. presidency. The stooge that defended the lack of armor on US tanks in Iraq by saying "...uh... you can have all the armor in the world on a tank... and... that tank can still be blown up."
A worthless idiot who doesn't give a good goddamn about the troops. A jerk that refuses to supply our troops with needed equipment and armor. Thinks that soliders are ungrateful when they ask for the right supplies.
Derived from Donald Rumsfeld, erstwhile SECDEF and all-around meanie, the term "rumsfeldian" is an adjective used to describe a truly tremendous blunder, such as NOT pursuing the jihadis in Afghanistan or invading/occupying a hostile country with far too few troops.