The act of delaying the completion of necessary tasks by occupying oneself with past/archaic entertainment media.
For example, the Nintendo Entertainment System (NES) A.K.A Famicom is one such medium with which retrocrastination is popular.
-Approximately 28% of all use of Nintendo Entertainment Systems is due to retrocrastination.
"Man, why the flip did I fail my flippin exam!? I thought I aced that shit!"
"Retrocrastination, dude. You've been playing Super Dodgeball and Excitebike all week."