Schrollster 

Someone who must always correct you, even when they know what you mean. Everything from Facebook comments to text messages.

Every time I use the wrong form of your or you're a schrollster corrects it.

Schrollster by The Aviation Professor December 6, 2010

Schoolsterbation 

When you get bored in class so you start shoving pencils, erasers, paper, desks, and other students up your butthole.

Kid:"I was so bored that i decided to perform schoolsterbation and shoved Jimmy up my ass."

Schoolsterbation by We can start at the penis October 31, 2013