Help me out here... If you have a single person hanging out with a couple, are they a third wheel or a fifth wheel?
I've always said fifth wheel because a fifth wheel is superfluous. A third wheel is a tricycle, which is a perfectly legitimate mode of transportation. But two critique partners, without talking to each other, just corrected me. Have I been wrong all this time?
cc/ @grammargirl
@jasonrush @grammargirl You would be a fifth wheel if you made a cylinder with your fist, and one of the couple put their finger in it, and you dragged them around by that coupling.