Rocking out. I mean, rocks are probably the best thing in the whole universe at just sitting there, doing nothing. Which means that they're the thing least likely to rock out.
Maybe next time I'm bedridden with sickness or hangover or worry, I'll tell someone I'm rocking out. And they'll ask me what I mean. And I'll say I'm acting like a rock.
And that's why English majors don't have any friends.