An imprudent or foolish act.

? Foolish matter. Obsolete. rare.

An example of foolishness; a foolish action, error, idea, practice, etc.; a ridiculous thing, an absurdity.

With a, etc.. An instance of folly or ignorance; an unwise act.

An instance of foolish or silly behaviour; a foolish practice or act.

The action of fool, v. (in various senses), esp. silly or joking behaviour; an instance of this.

A foolish action, practice, idea, statement, etc.; a folly, an absurdity; concrete something foolishly esteemed or venerated. Obsolete.

An instance of foolish behaviour; a foolish or ridiculous belief, action, or thing.

A foolish or ridiculous notion; a foolish hobby.

An incongruity; an absurdity; a triviality; = impertinence, n. 2a. Now rare.

That which is inappropriate, incongruous, or irrational; an absurdity; a triviality. Obsolete.

An instance of foolishness or absurdity; a silly thing, act, statement, etc.

= idiocy, n. 1. A stupid or foolish action, remark, habit, etc.

A foolish action.

Foolishness, folly; an instance of this; (also) †madness (obsolete). Now rare (English regional (Yorkshire) in later use).

Want of mental capacity; folly, silliness. With an and plural: A foolish act or remark.

A silly remark or saying; a foolish action. Also transferred.

With an and plural. An example of insipidity; an insipid person, remark, etc.

A foolish, ill-timed remark or action; a piece of folly.

A foolish or ridiculous action, behaviour, or thing.

An instance of jackassery; a foolish or stupid act, remark, etc.

colloquial. Nonsense; fooling around. Later chiefly: action or behaviour that is deceptive, dishonest, unethical, or otherwise suspect. Also…