noun, na-adjective, noun which may take the genitive case particle 'no'
foolish thing; stupidity; absurdity
Obsolete noun/adjectival noun for a foolish or absurd thing. Not used in modern Japanese.
古い文献では「おこな行い」のように使われた。
In old texts, it was used like 'a foolish act'.
noun
Obsolete noun for a foolish person. Replaced by words like 馬鹿 or 愚か者 in modern Japanese.
「おこ」は昔、愚か者を指す言葉だった。
'Oko' was once a word for a fool.
Ateji spelling; it is phonetic.
The exact derivation is uncertain. The kanji 痴 means 'foolish' and is used here for its meaning, while 烏滸 and 尾籠 are ateji (phonetic) spellings.