Affect

The slang term “affect” is short for “affectation,” which refers to the act of behaving or presenting oneself in an artificial or insincere manner. It is often used to describe someone who is putting on a false persona or trying too hard to impress others.

Examples:
1. “Karen’s constant affect of pretending to be interested in art just to fit in with the bohemian crowd is becoming quite tiresome.”
2. “He may have the latest designer clothes and a flashy car, but his affect is so transparent that it’s hard to take him seriously.”