Qué es foolish? Qué es foolish? Lacking or exhibiting a lack of good sense or judgment; silly: foolish remarks. Resulting from stupidity or misinformation; unwise: a foolish decision. Arousing laughter; absurd or ridiculous: a foolish grin. Immoderate or stubborn; unreasonable: foolish pride; foolish love. Embarrassed; abashed: I feel foolish telling you this. Insignificant; trivial: spent all their money on foolish little knickknacks.