This definition is cited by at least two books by Steven E. Ambrose, "Citizen Soldiers" and "Band of Brothers."
Soldier 2: What for?
Soldier 1: Some rear-echelon type saw me and said that I wasn't maintaing a professional appearance. I can't help it that we've been living in foxholes for the last week and because of the snipers, I can't shave.
Soldier 2: That's chickenshit.
2) Afraid; cringing; cowardly; reluctant to get off one's ass and put up.
3) Unintelligible verbiage, scrawl, or scritch-scratch.
He was too chickenshit to go down to the cellar and deal with Leatherface.
I can't make heads or tails out of this chickenshit they added to the agreement. Tell them to clarify it so we know we're eye-to-eye.