Shinysuck (verb): 1) To suck the shinyness out of something. 2) To work on only the interesting parts of a project or idea until the project is not completed, but all of the fun and interesting parts are finished and the remainder is boring or unpleasant. 3) To take something cool, fun or interesting, and use it up until the something still exists, but it is no longer cool, fun or interesting.
Dan and Mike hardly ever saw their projects to completion. Invariably they would shinysuck the fun parts and lose motivation to complete the hard parts.