To be so lazy that you won't come out of your bedroom except to eat and
go to the bathroom. That would require having to stop
playing video games, which would be a hassle, as you can't be AFK in your online game or you'll risk being banned, and it's too inconvenient to back out to the lobby after a match is over because your friends might play a match without you.
Things you can't do include (but is not limited to) walking your dog, taking out the trash, taking your laundry to the washroom, and
cleaning your room to the point where you don't even notice it smells like a gym locker room in there.