Ink Slider 

Someone who likes to sit on the tip of a pen, prefferably so that it slides into the anus. A way for a female (or male) to pleasure themselves in a school or university classroom.

Man! David was being a real Ink Slider today during japanese class

Ink Slider by seanrauharo May 9, 2007

inkslinder 

v. The act of mooning your grandma's cousin five times next to the statue of liberty

"Oh Joyce, your son is inkslindering me!"

inkslinder by Lade August 3, 2004