既き女じょ

彼かの女じょは既き女じょだから、合ごうコンには来こないよ。

She's a married woman, so she won't come to the group date.

Etymology

Abbreviation of 既婚女性 (kikon josei, 'married woman'), formed by taking the first kanji of each word. The exact origin is uncertain, but it likely emerged in online slang.