Third-person singular simple present indicative form of fool about

simple past tense and past participle of act a fool

plural of April fool

Expressed when the speaker has pranked someone successfully on April Fools' Day.

(transitive) To prank on April Fool's Day.

(transitive) To cause (someone) to seem foolish.

A person who lives an admirably holy but eccentric life, at odds with conventional lifestyles.

One who knowingly makes a decision or takes action that is to his/her own disadvantage.

(chiefly Eastern Orthodoxy) A person, often associated with gifts of prophecy and insight, who publicly acts as if mad or stupid, but whose madness is seen as concealing an inner sanctity for the purpose of self-humiliation.

(archaic, intransitive) To act foolishly.