Theseus
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Apart from the TV series of that name, it can mean an animated corpse or zombie.
It was appled to the 1st Battalion 9th Marines, nicknamed The Walking Dead, an infantry battalion of the United States Marine Corps. During the Vietnam War, the unit earned the name of The Walking Dead for its high casualty rate.
http://en.wikipedia.org/wiki/Walking_Dead
Compare the idiomatic 'the walking wounded' meaning:-
1. casualties, as of a military conflict, who are wounded but ambulatory.
2.informal . persons who have been damaged or defeated psychologically or emotionally by their experiences in life.
It was appled to the 1st Battalion 9th Marines, nicknamed The Walking Dead, an infantry battalion of the United States Marine Corps. During the Vietnam War, the unit earned the name of The Walking Dead for its high casualty rate.
http://en.wikipedia.org/wiki/Walking_Dead
Compare the idiomatic 'the walking wounded' meaning:-
1. casualties, as of a military conflict, who are wounded but ambulatory.
2.informal . persons who have been damaged or defeated psychologically or emotionally by their experiences in life.