A corrupt or unfit person who may corrupt others: But a certain number of rotten apples, predisposed to brutality, make it through psychological testing that can be woefully inadequate
[1940s+; fr the saying ''one rotten apple can spoil a barrel''; stated in a 1528 source as ''For one rotten apple lytell and lytell putrifieth an whole heape'']
This is no isolated incident, no "one rotten apple in the barrel."
We should no more eat bad grain than a rotten apple, or putrefying meat.
We opened a barrel of Spies last week, and I found only one rotten apple.
But he was pretty well all alone; there's got to be a rotten apple in the best-picked barrel and these boys were smart.
By way of instance, the sniff of a rotten apple will set a man off as on seven-league boots to the valleys of his childhood.
“Ratty is like a rotten apple in the middle of the barrel,” thought Frances.
Alick resented this remark, and the resentment was in the form of a rotten apple which struck the offender full in the mouth.
I'm going to give this rotten apple to one of the elephants and see what a funny face he makes when he chews it!
I don't know wherre you'rre going or what you'rre going to do and I don't carre a rotten apple.
They say she has a face like a cankered oak gall or a rotten apple lying cracked on the ground among the wasps.