something contracted while under the influence of "roofies"
ie, a venereal disease, or a child.
Guy1: Dude! a small, furry creature just crawled out of your pants! WTF?
Guy2: Man! I don't remember anything after those Roofies we took...but I must have gotten myself a rufus!
Guy3: You must have caught the Crumps!
A venereal disease contracted sexually in which small shrimp like creatures habitate in pubic hair. These creatures highly resemble ocean based crumpets, but are molescule in comparison. Easily treatable with douche.
Girl 1: WTF!!?? I just found a miniature shrimp in my crotch!
Guy 2: Holy Shit! You got the Crumps! You dirty bitch! I told you that your addiction to banging Hobos would lead to trouble!