As soon as your coworker takes a day off, everything that can burn to the ground, will burn to the ground. Leaving you and only you to deal with it.
It's Chris' day off and now half my staff quit, the server room exploded, and a honey badger decided to make a home inside my desk. Wrightson's Law at work.
A person that doesn't take much to fuck up your day, does it on a daily basis, and has minimum skills.
Jay is the reason I'm up at 10pm working on something he doesn't understand because he wants it in front of the customer tomorrow. He is my Minimum Daily Motherfucker.