Zipper Effect Edit Meaning

1.

The chain reaction caused during the last 10-15 seconds of class when someone loudly zips their backpack, this in turn causes everyone around him to look up at the clock and immediately start packing.

Guy 1: Class was taking forever today, I had to resort to the zipper effect.

Guy 2: Works every time.

See zip, zipper, effect, time, school, clock, class, college, late, early