A ludicrous folly.

synonyms: absurdity, fatuity, fatuousness.

Roget 499: want of intelligence etc. 498, want of intellect etc. 450; shadowness^†, silliness, foolishness etc. adj.; imbecility, incapacity, vacancy of mind, poverty of intellect, weakness of intellect, clouded perception, poor head, apartments to let; stupidity, stolidity; hebetude^†, dull understanding, meanest capacity, shortsightedness; incompetence etc. (unskillfulness) 699.    one's weak side, not one's strong point; bias etc. 481; infatuation etc. (insanity) 503.    simplicity, puerility, babyhood; dotage, anility^†, second childishness, fatuity; idiocy, idiotism^†; driveling.    folly, frivolity, irrationality, trifling, ineptitude, nugacity^†, inconsistency, lip wisdom, conceit; sophistry etc. 477; giddiness etc. (inattention) 458; eccentricity etc. 503; extravagance etc. (absurdity) 497; rashness etc. 863.    act of folly etc. 699.    ... show more

An impulsive scatterbrained manner.

synonym: giddiness.