Definition & Meaning of "nookie"in English

What is the origin of the term "nookie" and how is it used?

Nookie is a slang term for sexual intercourse that first appears in American English in the late 1920s, with one of the earliest written uses dating to 1928. Its origin is uncertain, but it likely comes from a playful alteration of "nook", meaning a small corner or hidden space, used metaphorically for private sexual activity. Some sources also suggest it may relate to older slang or dialect words referring to sexual action, though nothing is definitive. Historically, it was informal and non‑medical slang, used in casual, joking, or friendly contexts. Today it remains colloquial and somewhat crude, often appearing in pop culture or casual conversation rather than polite or formal speech.