In psychology-related slang, control freak is a derogatory term for a person who attempts to dictate how everything around them is done. It can also refer to someone with a limited number of things that they want done a specific way; professor of clinical psychology Les Parrott wrote that "Control Freaks are people who care more than you do about something and won't stop at being pushy to get their way."
In some cases, the control freak sees their constant intervention as beneficial or even necessary; this can be caused by feelings of superiority, believing that others are incapable of handling matters properly, or the fear that things will go wrong if they do not attend to every detail. In other cases, they may simply enjoy the feeling of power it gives them so much that they automatically try to gain control of everything around them. In the corporate world, control freaks tend to publicly admonish their inferiors, especially during meetings.
According to Calvin's father in the strip Calvin and Hobbes, a control freak is "what lazy, slipshod, careless, cut-corner workers call anyone who cares enough to do something right".