Misleading Advertising

noun a deceptive appearance or facade that hides the true nature of something

• The building had a false front that made it appear larger than it actually was.
• The shop's false front made it look fancier than it really is.
• That store's false front is just for show.
• He put up a false front of confidence to hide his insecurities.

adjective not expressing genuine feelings; pretending to be sincere

• His insincere apology did not convince anyone of his remorse.
• I can tell she's being insincere with her compliments.
• Don't trust him, he's always so insincere.
• The politician's insincere promises left the voters feeling betrayed.