
Stupidity
Negative Connotation
Stupidity implies a harsh judgment and should be used carefully to avoid offending someone.

Calling his idea stupidity made him feel disrespected.
Self-Deprecation
Sometimes used humorously about oneself to admit a mistake without harsh feelings.

I forgot my keys again, what a moment of stupidity!
Momentary Lapse
Can refer to a temporary lack of judgment, not a permanent trait.

Her decision was a moment of stupidity, not her usual behavior.
Compare with
DeficiencyFoolishIdiocyIgnoranceImbecilityIneptitudeInsensibilitySenseless
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