the world > action or operation > harm or detriment > disadvantage > uselessness > non-use > [noun] > discarding as useless > type of that which is (2)
old shoec1386
Phrases and figurative uses. old shoe: a type of something discarded as worn out, useless or worthless. Also, to cast, fling,etc. an old shoe after…
dead horse1640
taken as the type of that which has ceased to be of use, and which it is vain to attempt to revive.