The act of masturbating at high speeds to achieve climax in as little time as possible. Best used when you are unsure of how long you will be alone. Sound effects are encouraged but not necessary.
"She was only going to be gone for a minute so I powerbated and finished in 18 seconds. New personal best."
"So I made drill noises while powerbating. I felt like I was on a pit crew."
A temporary employee who has beeen exploited for a long duration of time in the workplace, doing the same task as full-time employees, but not receiving company benefits.
Being a permatemp is awesome because I get to grab my ankles all day.
A player of a game that seeks to use the system to dominate and frustrate other players.
This is typically not a problem when dealing with games that encourage competitive playing, but swiftly becomes a problem when the objective of the game is not to defeat your opponenet, either real or perceived, but to co-operate and socialize with other players.
As such, power-gamers are the bane of certain role-playing games, social games and online games like wordMUD/words and their ilk, and games where not everyone wants to make you their bitch.
However, certain games suit powergamers well -- games like Monopoly and the (now discontinued) Paranoia RPG setting by West End Games.
Well, yeah, Fabian is a power-gamer... he's a wonderful person to be with, and very accommodating, but never, ever, play against him -- you'll just end up hating him.