Stellen: I'm so gay my bitch is gay yada yada yada yada booga booga boo
Jackson: Stfu you Yapologist
Stellen: you best quit yapping before I suck your dick
The act of being a yahoo. Often personified accurately by Truman and his annoying camping tendencies--also could be a Jason camper--as well as his ridiculous classes.
Wow, that guy is yahooistic, yeah i know... Wait, Truman just joined our game on the other team.
Someone who studies the art and science of yapping intensively; someone who yaps a lot to the point where they know much of the science and art of yapping.