Brown Alley
A dark and lonely place , moist and lined with fecal matter, a brown star at the entrance.i.e a leather Cheerio
I can't explain what a brown alley is , but I can show you...
Brown Town Alley
When you're having sex, and you go back and forth from the asshole to the vagina.
"Me and my girl friend love doing Brown Town Alley. Strangely, I enjoy it more than she does."