bidie-in

/ ˌbaɪdɪˈɪn /

noun

1. a live-in sexual partner

Example Sentences

The public appeal also yielded a host of Scots terms, from “bidie-in”, which the OED defines as “a person who lives with his or her partner in a non-marital relationship”, and which it says was first recorded in 1916, to “bigsie”.

From The Guardian

By contrast, Karen’s relationship with her “bidie-in” — a fellow cop who lives with her, ruffles her hair and runs baths for her — feels tepid.

From Washington Post