I never met a Satanist who wasn't a wanker.

Back in the dim and distant mists of time I worked for someone who was convinced I was a Satanist. She reached this entirely logical conclusion after I got the DJ at our work Christmas do to play Temple of Love thus demonstrating that I listened to 'devil worship music'. An exceptionally stupid woman, I used her wildly allegations to wind her up by drawing pentagrams on my notebooks and spending the better part of three months filling a 100 sheet notebook with 'All work and no play makes David a dull boy', and then telling her that it was all my client notes when I left the company.
These days, I suppose having a go at me for worshipping the devil would be counted as religious discrimination and I'd be able to sue, which would have been even funnier. If I actually did worship Beelzebub I'd've put a hex on her, but mocking her ruthlessly was lots more fun.
She was undoubtedly my worst boss ever. Stupid, venal, grasping, selfish and utterly self-righteous.

So that's my question for today - who was your worst boss ever, and what was so bad about them?