What is a "Brown Queen" ?? (PervArtistry question)

Factual Questions
1

So my girlfriend and I were playing PervArtistry with some friends last night (basically pictionary/ charades w/ dirty terms to draw and act out) when we came upon a word that we had NO clue about. “Brown Queen.” We’ve searched online with no luck, and UrbanDictionary.com has no definition for it. We’ve discovered that the game’s website has an online glossary, but you need a password from the games’ rulesheet to access it and we don’t have it.

Anyone out there know what this term refers to? We’re pretty certain it has something to do with feces, in a Cleveland Steamer vein - but we think it might be more complicated than that. My girlfriend thinks it might mean going number two on someone’s head, giving them a queenly crown - but this is just a guess.

Anyone?

2

Here is the link to the official PervArtistry website in case you’re curious.

3

Here’s a Google cache of a message board thread that suggests it’s a term for money (presumably in England). I.e., a brown banknote bearing a picture of the Queen. But that’s not all that dirty.

Given how sparse any sort of slang usage seems to be on Google, though, I’m going to guess that it’s a copyright trap.