"Bidie-in" is a wonderfully plain-spoken and non-judgmental Scots term for a cohabiting partner, reflecting the practical, unsentimental approach to domestic arrangements that characterises much of Scots folk speech. In contemporary Scots poetry it appears as part of the project of rendering ordinary modern life in the vernacular, and it exemplifies the way Scots can describe social realities with matter-of-fact dignity. The word's lack of legal or moral connotation is itself a kind of democratic statement about the validity of different domestic arrangements.

Bidie-in reflects the pragmatic, unsentimental quality of Scots vocabulary, naming with affectionate matter-of-factness an arrangement that other dialects might struggle to name so neatly. It is deeply domestic and contemporary, common in modern Scots prose and conversation, and its appearance in contemporary Scottish poetry signals a poet working in living vernacular rather than antiquarian register. For students studying modern Scottish poetry — from Liz Lochhead to Don Paterson — awareness of terms like "bidie-in" is essential for understanding how Scots continues to generate new vocabulary from old roots. "Bidie" derives from "bide," meaning to stay or remain.