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Ninny

usgb/ˈnɪni/Volume
nounPlay

A person who is foolish and lacks common sense or intelligence.

Don't be such a ninny, you should look both ways before crossing the street.
Often appears as...
don't be a ninny
you're a ninny
Usage tips
LampInformal, Disapproving
LampColloquial
Left Definition 1 of 1Right
LampPro Tip 1/3
Colloquial UsagePlay
The term 'ninny' is casual and might be offensive in formal situations. SlideMy friends laughed when I called myself a ninny for forgetting my keys.
LampPro Tip 2/3
Possible OffensePlay
'Ninny' can be taken as an insult; use it carefully to avoid hurting others. SlideI jokingly called my brother a ninny, but he didn't find it funny.
LampPro Tip 3/3
Self-DeprecationPlay
Sometimes used humorously about oneself to show a small mistake or foolishness. SlideI'm such a ninny, I mixed up the meeting dates!