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1.
An oversized, massive clitoris that is so big that it can be frightening and occasionally mistaken for a male organ. It has been known to make grown men run for their lives.
Man, I got Cindy's pants off, dude, and started rubbing her crotch and she got a guinea horn that jumped up and sprang to life! Scared the crap outta me!
by Hornshark May 05, 2006
 
2.
A Clitoris that resembles that of a pigs foot and sticks through undergarments like a knife and is known as a "penis Clit" and a "pinchy"
Hey Terry, I bowed Mary up like a Halloween cat over the table and she had a guinea horn the size of my middle finger!
by allen_larken5 December 18, 2013
 
3.
aside from the common offensive definition, Guinea horn is also a type of baked cobbler consisting of Peach, blackberries, and strawberries, a very popular dish in Georgia and surrounding south eastern coastal states.
mother makes wonderful guinea horn cobbler.
by bakersdelight89 May 21, 2011