His fool bravado got him into trouble.

She realized she had been fooled by the elaborate trick.

She realized he had been fooling everyone with his fake credentials.

His fooling of the committee, once praised as clever, was later revealed to be a deliberate deception.

Her constant foolings finally eroded the trust of her friends.

Don't fool with the ancient machinery; you could seriously hurt yourself.

She April-fools everyone with an elaborate prank each year.

He sent me on a series of fools' errands that wasted my whole afternoon.

He fools around in the lab when the professor isn't looking.

April fools! I swapped the sugar for salt this morning and couldn't stop laughing when you took that huge sip.