Jackscrew
A stupid person who talks way too much, thinking they're smart, but everyone can see they're just a brainless idiot.
Hey, Jackscrew, did you even finish school or just took a nap during the test?
Man, Jackscrew went on for 10 minutes about how the sky is blue, but it's obviously just a giant dome.
Jackscrew tried to explain quantum physics like it was a math problem. It wasn't. It's just dumb.