power playing 

Power playing occurs in role playing, and it's when you control someone else's character, as well as your own, without the other person's permission

Say that I play Bob, and someone else is Susie.

Bob watched Susie as she started to walk away. he ran up to her, the girl of his dreams, and yelled, "SUSIE, DON"T LEAVE ME!" She turned around, and glared at him, with resentment in her eyes, before walking up to him, slapping him, and then walking away again

As you can see, if this were a post, I'd be typing Bob's actions, as well as Susie's. The fact that I'm typing Susie's actions is power playing

power playing by Shizune May 2, 2008

Now you're playing with power 

Nintendo marketing slogan from the 1980s and 1990s.

No, Bobby, just because the Nintendo commercial said "Now you're playing with power!" doesn't mean you get to plug this pair of scissors into an electrical outlet!

Now you're playing with power by ekolis September 23, 2013

playing poker 

Euphamism for a circle jerk used as a cover by geeks who are bored with jacking off alone and start jacking each other off.

Chad: Whatcha up to tonight?
Peter: Just hangin with the boys and playing poker.

playing poker by Jackson 5 September 1, 2006