oonchook
/ˈuːntʃʊk/ /ˈəʊntʃʊk/Irish English and Newfoundland
noun
1 Irish English and Newfoundland ( informal and derogatory ). A foolish, ignorant person, especially a female one; a dunce.
2 Newfoundland. Any of a number of men, usually dressed in women's clothes, who participated in a mummers' parade at Christmas. Now historical.
Origin
Early 19th century; earliest use found in John Banim (1798–1842), novelist and playwright. From Irish óinseach foolish woman, clown from the first element of Irish óinmhid fool (Early Irish óinmit, of uncertain origin) + -seach, feminine suffix, now often used in derogatory expressions. Compare Scottish Gaelic òinseach.