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man who removed his own penis
stands and unbuckles pants and drops them to his ankles, revealing a smooth, shaven crotch with only a thin scar to show where his genitals once were
by rob nash July 25, 2003
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Class 1 Nullo - A man who has had his testicles removed (castrate).

Class 2 Nullo - A man who has had both his penis and testicles removed (smoothie).

Class 3 Nullo - A man who has had his penis, testicles, nipples and belly button removed (extreme smoothie - xsmoothie).

Class 4 Nullo - A man who has had his penis, testicles, nipples, belly button, fingernails and toenails removed (nullunx).

Class 5 Nullo - A man that has had his testicles, penis, prostate, seminal vesicles removed to prevent any sexual function and who cannot physically ejaculate. In addition, his nipples and belly button has been removed to prevent any sensitive parts of his body from being stimulated. His has had both his fingernails and toenails removed so that the end of his phalanges are smooth. (extreme nullunx - xnullunx)

Class 6 Nullo - A man that has had his testicles, penis, prostate, seminal vesicles removed to prevent any sexual function and who cannot physically ejaculate. In addition, his nipples and belly button has been removed to prevent any sensitive parts of his body from being stimulated. His has had both his fingernails and toenails removed so that the end of his phalanges are smooth. In addition his ears have been removed so that he has no protrusions on his body (unicorn).
After the man had sexual confirmation surgery, his dream was to become an xnullunx (the ultimate nullo).
by XnullunX November 25, 2018
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a complete void of a man’s ability to ejaculate, due to extreme sexual activity
Annie was bragging to her girlfriends how she wore her boyfriend out last night…

”by the time I got done with Walter last night, he had nullo!”
by ReginaandRay February 22, 2007
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