Television cheating

You commit to watching a tv series with someone else, usually a partner, but watch an episode, or more without that person. Especially egregious if you watch a season finale without your tv partner.

Zach: Wanna watch the last episode of Game of Thrones tonight?
Emma: Oh, I watched that last night when you were working.
Zach: Wtf! You're television cheating on me hoe??