ninneryn.
/ˈnɪn(ə)ri/, U.S. /ˈnɪn(ə)ri/ colloquial. rare.
The behaviour, actions, or ideas of a ninny; foolishness.
ΘΚΠ
the mind > mental capacity > lack of understanding > stupidity, dullness of intellect > [noun] > stupid deed, thought, etc. > practice of
sotting1583
ninnery1600
ninnyism1804
boobyism1805
twattery?1979
1600 tr. T. Garzoni Hosp. Incurable Fooles A 4 Folly was their mother, Buffonerie their sister, Ninnerie their companion.
1888 C. M. Doughty Trav. Arabia Deserta I. ix. 263 These loose ‘Arabian’ tales of the past border-cities, were but profane ninnery to their stern natural judgments.
1982 Financial Times (Nexis) 16 Oct. 12 Women's Lib is pretentious ninnery, so we are given to understand, and we all know what it is that they really want.
This entry has been updated (OED Third Edition, September 2003; most recently modified version published online March 2022).
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n.1600