Make a list of all the dirt you have on him. All the shady shit - drinking at work, cheating on wife, all that.
Write it on a piece of paper, and put it in your pocket.
Walk in, tell him you need time off, with a smile, and ask if that will be a problem.
If he say yes, smile, put the note on the desk, and walk out.
He will chase you down in the hallway begging you to come back after your break.