Is that the angle of the two walls form an outside angle of less than 90 degrees where they come together. So if the studs are installed perpendicular to the floor plates, there is a gap at the corner where the 2 studs meet. The inside edge of the studs touch each other and the outside edges are separated.
If the gap formed at the corner is 1 1/2 inches or less, I wouldn't worry about it. Just nail (screw) the drywall up, install the corner bead, and finish as usual.