n. an activity which stretches the geek muscles, such as developing a skin or script for your favorite software, i.e. foobar2000
v. partaking in such an activity, specifically for an extended period of time
"Man, I'm fucking exhausted. I just spent 5 hours programming a formatting string for foobar"
"What does it do?"
"Automatically updates the title bar with information that may be of some interest to me based on the artist, album, track name, and genre tags."
"D00d, that is some major geexcercise!"