The assumed after-effect of anal sex. An insinuation that one's urethra will fill with feces durning anal sex, much like a chocolate shake drank through a straw and later expelled; appearing to be a "brown worm".
"She's on the vagina bleed this week. Looks like I'll be pissing the brown worm for a while."
by Clint M. January 4, 2006
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