brown dog is barking at the back door Share definition Flag The Brown Dog is barking at the back door. i.e. to have a shit. I'll be back in a minute, the brown dog is barking at the back door brown dog is barking at the back door by mickotoole November 7, 2005 0 0 Get merch Get the brown dog is barking at the back door mug. Buy Now — $32.95 See more merch