Jack Barf
A person who thinks they're a genius but actually can't tie their shoes. They're like a broken toaster that also yells.
My mom is a Jack Barf. She tried to fix the internet with a banana and a rubber band.
That guy at the gym is a Jack Barf. He lifts a dumbbell and calls it a 'mystery weight.'
My dog is a Jack Barf. He barked at a cloud and it started raining.