The meth capitol of the world consisting of a few small towns like Crystal City, Festus, Hillsboro, Arnold, Barnhart, Imperial, & Desoto. Town names have different names from the locals eg. Crystal Meth City, Fetus, & D-Town. Located south of STL.
Guy 1:Dude did you see her? What was she on?
Guy 2: Oh don't worry she's from Jeffco.
by s84freedom June 3, 2009
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Continuous stimulation of the clitoris with flatulence until climax is achieved
Jason had such horrible White Castle farts. He got Alex off with the Jeffco Jiggler.
by Gump4720 October 10, 2013
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