Earigo
A swear word for someone who can't do simple stuff. It's like calling someone a baby but with more hate and fewer lullabies.
You spilled your juice. Earigo. You're lucky I didn't throw it back at you.
You couldn't lift the pencil. Earigo. I'm writing your name on the board for you.
You tried to run. Earigo. You looked like a turtle on a skateboard.