What is a synonym for snollygoster?

There isn't a single perfect synonym for "snollygoster" because it's a rather unique word with a specific connotation. However, depending on the context you want to convey, here are some potential substitutes:

Formal:

* Demagogue: A political leader who appeals to the emotions and prejudices of people rather than to their rational side.

* Charlatan: A person who pretends to have more skill or knowledge than they actually do.

* Fraud: A person who deceives others, especially for their own gain.

Informal:

* Slickster: A smooth and cunning person, especially one who is dishonest.

* Rake: A person who is immoral or dissolute, especially one who leads a life of pleasure.

* Scoundrel: A dishonest or unscrupulous person.

* Sharper: A person who is skilled at cheating or swindling others.

Slang:

* Crook: A person who is dishonest and criminal.

* Con man: A person who cheats others out of money or possessions.

* Grifter: A person who makes a living by dishonest means.

Ultimately, the best synonym will depend on the specific context and the nuances of the situation.