Though commonly misconceived as the anal canal through which gerbils at times migrate, a la Richard Gere (that region is better termed "gerbils' boulevard of broken dreams"), rats' alley is a horse of another color. Rats' alley is, in point of fact, not only the anal canal, but also the oral, vaginal, optical, nasal, auditory, wound-ary, navel, penile, areolar, carpal, and phallangular canals through which rats at times not only migrate but defecate upon.
"Did you see all the rats in Julia Roberts' rats' alley last night? She looked like that girl from Indiana Jones!"
by The Phantom Menace October 31, 2007