A violent waste of time. Extreme waste of time. Failing to keep track of time. The destruction of usefulness by inaction. The cessation of time or of conceptual of time. The removal of all notion or sense of time. Negligence of time. Defiance of the principal of time.
(See also chronocide)
I spent HOURS on the interweb today, but didn't get a thing done. Complete chronoslaughter!