When you know you are leaving on a trip a few days in advance, yet you put off packing till minutes before you leave.
Sometimes used as a tool to increase stress to make sure you don't forget anything important
David: Dude, did you hear Isaac isn't even packed yet?
Chris: Yeah dude, he told me that he still has a pile of dirty laundry to do, and the bus leaves in 2 hours!
David: Yeah no kidding, looks like he will be in for some procrastipacking