What is Zipper Effect?
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.
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Random Words:
1.
Act of male fucking female in both vag and rectum, with aid of strap- on. Can be difficult to perform, as strap-on can pop out of the va..