invisible wall Share definition Flag The foul smell that you run into in a bathroom, usually when somebody is on the can taking a crap. Dude, I went into the bathroom last night, and I ran into my girl's invisible wall. It was so bad, I just left right away. invisible wall by Rickie Jr. August 20, 2007 0 0 Get merch Get the invisible wall mug. Buy Now — $32.95 See more merch