Noun
The quality of being foolish.
A foolish practice; an absurdity.
Source: Webster's dictionaryFirst love is only a little foolishness and a lot of curiosity. George Bernard Shaw
Women's liberation is just a lot of foolishness. It's men who are discriminated against. They can't bear children. And no one is likely to do anything about that. Golda Meir
As favor and riches forsake a man, we discover in him the foolishness they concealed, and which no one perceived before. Jean de La Bruyère
Useless wisdom is double foolishness. Icelandic Proverb
The mouth of fools pours out foolishness. American Proverb
To make an error is human, keep doing it is foolishness. Portuguese Proverb