Nullo

[Oralee]

(a) A contract in some varieties of bridge and in certain other card games, in which the object is to win no tricks or to prevent the contract from being made. (b) In some varieties of contract bridge: each of the tricks beyond a total of six which a bidder can undertake to lose, when play is conducted in no trumps. Also in plural: (play in) no trumps when such a contract has been made.

[Kit]

[Males] who have their [genitals] [removed].

[Sommer]

[man] who [removed] his own [penis]

[Justin Bieber]

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).

[Merna]

a complete [void] of a man’s ability to [ejaculate], due to extreme [sexual activity]