jargon.artrocity.com
New Hacker's Dictionary the Jargon File v 4.4.6
[from the Apple Macintosh, which is said to encourage such behavior] To make many incremental and unnecessary cosmetic changes to a program or file. Often the subject of the macdinking would be better off without them. “When I left at 11PM last night, he was still macdinking the slides for his presentation.” See also fritterware, window shopping.