Definitions by FSUAXE

App-up 

Some one who is up on all the latest iPhone, iTouch, iPad, applications.

Dude one: "Hey man, did you get that app that tells you when to take a sh*t?"

Dude two: "No man... Still waitin' for the iPad before I could be app-up."

App-up by FSUAXE May 11, 2010