(to make) (something) made or done in imitation of another thing in order to deceive

fake, simulated

not real or genuine; to make fun of (a person, way of speaking etc) (especially by copying in an unkind or disrespectful way)

artificial, fake

claiming (without justification) great ability, qualities or importance

snobbish, conceited

to pretend (to be in the condition mentioned)

artificial, counterfeit

false; not genuine

counterfeit, fake

not authentic

counterfeit, fake

not natural or normal

not regular; artificial