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
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.
P1: Why is P3 talking so much?
P2: It's because he's aprofessional yappologist.
P3: Yapping