1. The use, esp. on Twitter by Craig Hockenberry (after whom the technique is named), of caps lock, no punctuation, and occasional misspellings to represent the speech of a somewhat mentally inferior alter ego.

2. The Caps Lock key itself when used as in 1.

3. A fictional key (or setting) actually labeled "CHOCK LOCK" on a keyboard (or in an app), usually replacing Caps Lock.
MORE IMPORTANT THAN SOURCE CODE FOR IPHONE AND RESUMES WERE TALKING CHEARLEADERS AT CHOCKLOCK.COM GO CHOCK LOCK GO HOME RUN
by Lanny Heidbreder October 9, 2008
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