To unexpectedly -- and spectacularly -- destroy your career in a single act so obviously wrong that having someone tell you "you should know better" would be blatantly redundant

When someone thinks they are the main character of their life. Usually comes with a side of individuality complex, quirky style and a self centered point of view.

If one engages in a wrong activity, confident that one will not get caught, but the activity unexpectedly emerges to the surface and brings the downfall, one spitzers himself.

To lay pipe on a prostitute. It can also refer to getting cockblocked by the police or the Feds while trying to lay pipe on a prostitute.

A married, government official, who gets caught administering substantial amounts of money to have sex with a prostitute(s) over the course of many months/years well aware how wrong it is and the consequences.

A middle-aged man who prefers younger women - and not in a good way.

The opposite of a sleazier style of cougar.

Someone who advocates against what he is, does, or believes.
Hypocrite