General Fakeness:
* As genuine as a three-dollar bill. (implies worthlessness)
* As real as a plastic flower. (lacks authenticity)
* As true as a politician's promise. (deceitful)
* As authentic as a counterfeit Rolex. (imitation)
* As original as a copycat. (lacking originality)
Specific Types of Fakeness:
* As genuine as a social media influencer's smile. (forced)
* As heartfelt as a politician's campaign speech. (insincere)
* As emotional as a robot. (lacking genuine feeling)
* As natural as a spray tan. (artificial)
* As original as a cover song. (lacking originality)
Humorous Similes:
* As real as a unicorn's horn. (mythical)
* As genuine as a politician's promise of lower taxes. (unrealistic)
* As authentic as a Hollywood smile. (manufactured)
The best simile to use will depend on the specific situation and the tone you want to convey.