zipper effect

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.

by mmalone July 13, 2009

zipper merge

A zipper merge happens when motorists use both lanes of traffic all the way to a defined merge area, and then alternate in "zipper" fashion into the open lane. By doing it this way, both lanes are used right up until the end, which advocates like New think is a more efficient use of road space.

1st Motorist: "Zipper merging is best for slow heavy traffic. If traffic is light, early merging is fine."
2nd Motorist: "Only problem with zipper merge are the idiots who will not let you merge in front of them so they pull up tight to the car in front of them. They do this even if you try to merge early. I typically will merge at the first available open space."

by humblepiece May 23, 2015

Zipper Muffin

When a girl's pants are so tight you can read her lips. Also known as Camel Toe and Beaver Floss

Man, did you see that girl's zipper muffin? I coulda swore it said something to me.

by Ryan March 13, 2005

Zipper Bumping

male becomes erect enough that his penis is pressed against the zipper of his pants.

Yo Ming! you see those two asian school girls making out on the bus, got me straight up zipper bumping....ya digggggg?

by RidiculousIsHe February 27, 2015

zipper fight

When you dry hump your girlfriend.

Dude did you finally get some? Hell no we just had another zipper fight and a wasted boner.

by Joe bagadonutz January 13, 2016

zipper snipper

When the zipper in your pants cuts your dick off.

I was so hungover, I gave myself a zipper snipper

by Wonky Tonky September 1, 2016

zipper lickin pond lizard

Female that tends to hangout around ponds or lakes where groups of males tend to gather drink and fish,these females tend to be cum dumpsters for these men and don't care if the are in a relationship!

That woman is a zipper lickin pond lizard.

by Ringer77 May 31, 2018