It means that it lacks courage, that it is not brave. Pusillanimous, lazy, fearful, fearful, timid.
It is said of the "fearful, fearful, pusillanimous". It has a remote origin in the Latin cauda, ae ("tail"), since dogs hide the tail between their legs when they are afraid.
Nothing is more cowardly than money: ( minor symptom risk tends to move away from the focus of the 41 risk;.Book: "THE language of the Argentine expressions, perceptions, and idioms that link us.