Green’s Dictionary of Slang

1. (Polari) anywhere one can find privacy to have sex.

2019

P. Baker Fabulosa 289/1: bedroom a place where men can have sex, such as a toilet cubicle in a cottage.

2. used adj. sexually obvious.

1984

A. Sample (con. mid-1930s-early 1940s) Racehoss 41: She mellowed her intense gambling expression into a sexy, sleepy-eyed bedroom look, and flashed it to him like a lightning bug.