Grammatical Pedantry Syndrome 

Grammatical (or grammar) pedantry syndrome is an illness or a form of obsessive-compulsive disorder where someone has a compulsive desire to correct any grammatical errors one has made and is obsessed with taking this peculiar, constant, and vexatious (from the target's perspective) action.

"Me and mark ate cookies!"
"You mean, 'Mark and I ate cookies!'"
"Stop it!"
"Sorry, I have Grammatical Pedantry Syndrome."

Grammatical Pedantry Syndrome by Terminological inexactitude September 18, 2013

Grammatical Pedantry Syndrome 

A fake syndrome created in a joke blog by Dennis Baron of the University of Illinois. Many people were fooled by Baron, as the article heavily uses scientific jargon, making it appear like a legitimate piece of scientific literature, but the actual text includes a litany of linguistic jokes and signs that it is actually a hoax. Also, anyone with a basic understanding of OCD would be able to tell that the purported symptoms of "GPS" are dissimilar to actual OCD symptoms; OCD is an anxiety disorder defined by intrusive thoughts and repetitive behaviors, not a need for order or structure.

Grammatical Pedantry Syndrome is a load of baloney, however I do have Memetic Veracity Syndrome; that is, the need to correct false information (particularly contained in memes) on the internet.

Grammatical Pedantry Syndrome by Jimbeezy4sheezy December 14, 2017

Grammatical Pedantry Syndrome 

Grammatical (or grammar) pedantry syndrome is an illness or a form of obsessive-compulsive disorder where someone has a compulsive desire to be an asshole.

"Me and mark ate cookies!"
"You mean, 'Mark and I ate cookies!'"
"Stop it!"
"Sorry, I'm an asshole (Grammatical Pedantry Syndrome)."

Grammatical Pedantry Syndrome by borlaxis May 16, 2017