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1. A wall that flips around to reveal a secret room used exclusively for sex.
2. The 69th wall in a room because you have a room that, for some reason, has at least 69 walls in it.
The rockstar led her friend to the 69th wall, where she immediately passed out from the strong scent of night after night of steamy sex.

"Jesus, Phil! How many walls does this room have? This has to be at least the 69th wall! Why not just have a circular room? What's the matter with you?
by Sunny "D" February 21, 2018
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