One person habitually dominating another, much like Player 1 in a multiplayer game. Usually stems from too much time in a socially-stressful environment.

Can only be treated by a punch in the face from a close friend.
Guy: *grabs the remote* we're watching this now!

Girl: ugh your Player 1-syndrome is resurfacing again!
by BadWolfFile July 28, 2010
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