faker

Short definition from Wiktionary

Noun

1. 1
   One who fakes something.
2. 2
   An impostor or impersonator.
3. 3
   A friendly unit (usually aircraft) that acts as a hostile unit in a military exercise.
4. 4
   A thief.
5. 5
   A peddler of petty things.
6. 6
   A snake oil salesman; one who makes exaggerated claims about a product he sells.

Adjective

1. 1
   comparative form of fake: more fake.