Jackscrew
A loud, dumb person who talks about how smart they are, but everyone can see they're just a brainless annoyance.
Jackscrew screamed at the class for 10 minutes about how the sky is a dome. It's not. It's just a big blue blanket.
Jackscrew called me a ‘dumbass’ for not knowing what a jackscrew is. I looked it up. It’s just a dumb tool.
Jackscrew tried to explain the universe like it was a math test. It’s not. It's just dumb.