It has been months that Ivar has cried this expression in frustration. He uses it a lot in the car. Sometimes after he has gotten dressed. Rory finally figured it out. And now it seems so obvious!
Any uncomfortable gathering of clothing that leads to frustration, irritation or annoyance. Common sockie booboos occur after shoes are put on and there are bumps in the socks. Or inside the sleeve of a sweatshirt when the long sleeve under shirt gathers at the elbow. Or while traveling in a car seat the hood of a winter coat is bunched behind the neck.
It's a good word, isn't it? Helpful and original too. Pretty sure someone should let Merriam Webster know.