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1.
the part of the penal shaft below the nutious bagious just forward of the taint. usually useful only during the time a semi or during a full stiffy
I awoke pleasantly by my playmate lightly scratching my underpenis turning my morning semi into a full hard-onwhich I proceeded to fu.......ect....ect........ until the three stooges came on
by the mac al February 28, 2006
 
2.
the part of the dick shaft that bends into the body, under the ball bag
as I lit my camp counselors fart a delayed ignition singed the hair from his under penis and around his dirty hole
by themacal December 02, 2006