Fatengitis 

A disease where you have to eat everything 24/7

Sorry I ate everything, mom, you see, I have fatengitis

Fatengitis by MrsJeonBeyotch November 14, 2019

faningitis 

An acute case of fanatacism causing the victim to disregard embarassing behaviour and neglect personal hygeine, health and wellbeing in pursuit of coveted thing. Adapted from meningitis although no less severe, faningitis can turn susceptible persons into blubbering, jabbering, bodily-function-ignoring tragics.

Dude, that trekkie's got serious faningitis.

faningitis by James Eunson October 22, 2006

Fatfagitis 

Dawson...

Hey I think dawson has fatfagitis.

Fatfagitis by 123469420 March 11, 2022