Works well, but only when under constant supervision and cornered like a rat in a trap
His men would follow him anywhere, but only out of morbid curiosity.
I would not allow this employee to breed.
This employee is not so much of a has-been -- more of a definite won't-be.
Since my last report, he has reached rock bottom and has started to dig.
He would be out of his depth in a parking lot puddle.
This young lady has delusions of adequacy.
She sets low personal standards and then consistently fails to achieve them.
This employee should go far -- and the sooner he starts the better.
A room temperature IQ.
Got a full 6-pack, but lacks the plastic thingy to hold it all together.
A gross ignoramus -- 144 times worse than an ordinary ignoramus.
A prime candidate for natural deselection

One neuron short of a synapse.
Wheel is turning, but the hamster is dead.