A boss who gives you promises about benefits, good pay, etc but once you're already under him / her, all these promises instantly turns into myth.
A boss who can evaluate you and the results are always negative.
A boss who talks more about "self-glorification" and always has the greatest story among his / her subordinates.
A great false hope provider.
A pathological liar.
Peter: My political boss gave me another 10,000 promises...
Mark: Lol! One of those is the "team leader" position right? That was centuries ago!
Luke: Hey John, Pat told me he'll give me a lot of projects this month!
John: Pat? Stop dreaming Luke. He's a political boss.