Sadist

[Rihanna]

One who gets pleasure (often sexual) from the suffering of others. It is a common myth that sadists like masochists, however the true sadist can get no pleasure from the pain he causes the masochist because the masochist is enjoying it.

[Becky]

Somebody who builds metal playgrounds for kids in the southwestern part of America.

[Couch Potatoe]

Someone who gets psychological pleasure from inflicting pain on someone who enjoys it.

[Becky]

One who has a sadistic personality disorder which is characterized by deriving satisfaction from the physical or psychological suffering of another person. A person of this type is controlling, likes to humiliate a person in public, disciplines brutally when in a position of power, and likes to intimidate people.

[Becky]

A group of software engineers who derive sexual satisfaction from releasing such [open asshole] pieces of software as [AOL], [Windows ME], and [soulseek]

[Sarah]

The deriving of sexual gratification or the tendency to derive sexual gratification from inflicting pain or emotional abuse on others.

[Tina]

A sadist is a person who gain pleasure from seeing others undergo pain and discomfort.

[Britney]

A person who enjoys seeing/ causing others pain, suffering and humiliation; usually getting sexual pleasure from doing so.

[Tina]

Someone who enjoys [seeing] [others] [in pain].