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1.
Everything from the asshole to the front butt (male/female/shemale inclusive)
(see main entry for jawn)
Man, I could totally see her underjawn up her skirt!

or

My underjawn is all chafed and sweaty from riding my bike all day.


by Hogs of the Forsaken July 10, 2008

Words related to underjawn

cock genitals junk perineum pussy taint