Definition & Meaning of "yer one"in English

What does "yer one" mean in Irish slang?

In Irish slang, "yer one" refers to an unnamed or unspecified female person, usually someone the speaker does not know or does not want to name. It is commonly used in casual Irish English in storytelling, gossip, or everyday conversation when referring to someone indirectly. The expression became widespread alongside "yer man," used for males, as a standard way of avoiding names in informal speech. "Yer" comes from "your," but in this usage it does not indicate possession; it simply acts as a vague reference meaning "that person."