The state, quality, or condition of being fool-hearted.

(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.

(forestry) Synonym of widow-maker (“dangerous broken tree limb”)

plural of fool killer

Alternative form of play the fool

Synonym of Christian

A philosophy of life, holding that people who do not look for an easy way of earning a living are foolish.

Alternative spelling of April Fools' Day

(economics) Theory that the price of an object is determined by irrational beliefs and expectations of market participants, rather than intrinsic value; i.e. that one can make money by buying something for the sole reason of selling it to some one else for a higher price.

Alternative form of you could have fooled me