I had an American Lit professor who hardly ever showed up to class.
It was a 7:30AM Sophomore english class (which meant that I had to go or else)...and I don't know how many times the English Dept. secretary had to come and tell us Dr. Marshall wasn't showing up that morning. We'd all be pissed off because we all could have slept in that morning.
And when he DID show up to class, he'd be late and often looked hungover or he had no sleep. He'd be so bad with grading papers and returning them to us. Once he even "lost" our assignments (he said he lost them at Macy's, but we knew he was a regular at Club Rose, the skankiest Korean hostess bar in town) and then they MIRACULOUSLY showed up outta nowhere.
The best was getting the papers back... and seeing the stains and indentations of the bottom of a beer bottle. My guess was that he drank Heinekens.