Charlatan (noun)

1. A person who makes false claims to expertise or knowledge in a particular field, in order to deceive and exploit others.
2. A person who engages in fraudulent or deceptive behavior in order to gain attention, power, or money.

Origin:

Derived from the italian word ciarlatano, meaning 'quack' or 'imposter'.

Examples:

1. The so-called psychic was revealed to be a charlatan, who had been preying on vulnerable people for years.
2. The health guru was exposed as a charlatan, whose miraculous remedies were nothing more than sugar pills.
3. The charlatan claimed to have discovered the secret to immortality, but it was all a scam to take people's money.
4. The motivational speaker was a charlatan, who had no real insights or experience to offer, but relied on emotional manipulation to get people to pay for his courses.
5. The charlatan was eventually caught and brought to justice, but not before causing considerable harm and suffering to his victims.