Faker (noun)

1. A person who pretends to be something or someone they are not, typically in order to deceive or defraud others.
2. A person who does not have the skills or qualifications they claim to have.

Origin:

From fake (not genuine, fraudulent or counterfeit) + -er (a suffix indicating a person or thing that performs a particular action).

Examples:

1. He was caught as a faker, pretending to be a doctor.
2. The police arrested a faker who was selling fake designer handbags.
3. She was exposed as a faker, with no real qualifications in the field.
4. The company fired the faker after discovering he had falsified his resume.
5. The faker had been tricking people for years, pretending to be someone else.