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1.
Derived from "oh no" in an uncultured accent. If something is 'onyay' it is without class or is unsophisticated whilst purporting to be upper-class or sophisticated.
"Her hair cut is so onyay" used for example, if someone attampts to follow current fashions without success. eg a 1980's cripm
by Outre Gal September 01, 2003