Donated his brain to science before he was done using it.

He doesn’t know the meaning of the word fear, but then again he doesn’t know the meaning of most words.

I would not allow this employee to breed.

Fell out of the family tree.

May a Misguided Platypus lay its Eggs in your Jockey Shorts.

This employee is really not so much of a has-been, but more of a definite won’t be.

Gates are down, the lights are flashing, but the train isn’t coming.

Sarcasm: intellect on the offensive.