1fool 
/ˈfu:l/ noun
plural fools /ˈfu:l/ noun [count] 1 : a person who lacks good sense or judgment : a stupid or silly person
▪ those fools who ride motorcycles without wearing helmets ▪ Only a fool would ask such a silly question. ▪ You'd be a fool to believe what he tells you. ▪ You're making yourself look like a fool. ▪ A fool and his money are soon parted. [=a foolish person spends money too quickly on unimportant things] ▪ Any fool can see [=anyone can see] that he's lying. ▪ I never thought you'd be fool enough to believe him. = I never thought you'd be enough of a fool to believe him. ▪ (informal) Only that fool of a brother [=that foolish brother] of yours would ask such a silly question! ▪ (informal) Some (damn/damned) fool of a driver kept trying to pass me! ▪ Fools rush in (where angels fear to tread). [=it is foolish to take action if you do not know much about what you are doing] ▪ (Brit, informal) (The) more fool you if you believe him. = (The) more fool you for believing him. [=you would be a fool to believe him] ▪ (Brit, informal) More fool him for trusting her. ▪ There's no fool like an old fool. [=a foolish old person is especially foolish because an old person should have learned from experience not to make the kind of mistakes a young person makes] ◊A smart or clever person can be described as no fool or as nobody's fool.
▪ He may not look very smart, but he's no fool. ▪ Don't try to trick her—she's nobody's fool. 2 US, informal : a person who enjoys something very much
▪ He's a dancing fool. [=he loves to dance] ▪ He's a fool for candy. [=he loves to eat candy] 3 chiefly Brit : a dessert made with cooked fruit and cream or a thick sauce
▪ a strawberry fool 4 : jester
▪ those fools who ride motorcycles without wearing helmets ▪ Only a fool would ask such a silly question. ▪ You'd be a fool to believe what he tells you. ▪ You're making yourself look like a fool. ▪ A fool and his money are soon parted. [=a foolish person spends money too quickly on unimportant things] ▪ Any fool can see [=anyone can see] that he's lying. ▪ I never thought you'd be fool enough to believe him. = I never thought you'd be enough of a fool to believe him. ▪ (informal) Only that fool of a brother [=that foolish brother] of yours would ask such a silly question! ▪ (informal) Some (damn/damned) fool of a driver kept trying to pass me! ▪ Fools rush in (where angels fear to tread). [=it is foolish to take action if you do not know much about what you are doing] ▪ (Brit, informal) (The) more fool you if you believe him. = (The) more fool you for believing him. [=you would be a fool to believe him] ▪ (Brit, informal) More fool him for trusting her. ▪ There's no fool like an old fool. [=a foolish old person is especially foolish because an old person should have learned from experience not to make the kind of mistakes a young person makes] ◊A smart or clever person can be described as no fool or as nobody's fool.
▪ He may not look very smart, but he's no fool. ▪ Don't try to trick her—she's nobody's fool.
▪ He's a dancing fool. [=he loves to dance] ▪ He's a fool for candy. [=he loves to eat candy]
▪ a strawberry fool
act/play the fool
: to behave in a silly or foolish way
▪ If you keep playing the fool by asking silly questions, people won't take you seriously.
▪ If you keep playing the fool by asking silly questions, people won't take you seriously.
make a fool of yourself
: to behave in a very foolish or silly way
▪ He got drunk at the party and made a fool of himself. ▪ He's making a fool of himself over that woman.
▪ He got drunk at the party and made a fool of himself. ▪ He's making a fool of himself over that woman.
make a fool (out) of
: to cause (someone) to look stupid or foolish
▪ She made a fool of me by insulting me in front of my friends.
▪ She made a fool of me by insulting me in front of my friends.
— see also april fools' day
