She thought she had a foolproof plan to ace the exam.
foolish behavior
Frequency:
45
%
Her foolish behavior at the party embarrassed her friends.
fool's paradise
Frequency:
35
%
He was living in a fool's paradise if he thought he could get away with cheating.
Idiomatic Expressions for fool
Phrase: more fool you
Meaning: used to express disapproval or criticism towards someone for their foolish actions or decisions
Usage: You lent him money without getting a written agreement? More fool you.