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.
Guy 2: Works every time.
by mmalone July 13, 2009
The act of placing your bare junk (usually male) onto the person sitting directly in front of you during class in the fashion a bird would perch onto a tree branch.
Guy 1: Yo dude, today I just lost it and started perching up on this d-bag who had been annoying me all semester.
Guy 2: Gross man.
Guy 2: Gross man.
by mmalone July 13, 2009
Guy 1: Was that the girl from last night?
Guy 2: DNAss isn't showing a match. Wasn't her.
Guy 1: Ok, thanks.
Guy 2: DNAss isn't showing a match. Wasn't her.
Guy 1: Ok, thanks.
by mmalone December 09, 2009