zipper sparking 

Zipper sparking refers to the act of dry humping while clothed.

Like dry humping it is the process of two people repeatedly rubbing their crotches on each other while fully clothed. Often achieving an orgasm.

"Oh man John wanted to zipper spark with susie so bad behind the bleachers at the Junior High School"

zipper sparking by JrMint September 27, 2004

Zipper Erection 

When the zipper tab on your shirt, sweatshirt, pants, etc sticks straight out as if sexually aroused

Chris has such a huge zipper erection right now.

Zipper Erection by HOLY CRAP I NEED A NAME September 24, 2016

zippertard 

A dufus, often due to being shitfaced or hungover, who cannot remember to zip up his or her pants.

You’re such a zippertard, honey, you might as well just leave it down permanently!

zippertard by Dr Bunnygirl August 17, 2019

Unzipping the Zipper 

A term used to describe any sort of irresponsible action, not just an irresponsible sexual encounter.

Ignoring the $6.79 in his account, Jeremy told me he was "unzipping the zipper" by buying a $400 flat-screen television for his new apartment.

Unzipping the Zipper by Keeping the Zipper Zipped July 25, 2009

zippertits

The scars of trans men who got their breasts removed surgically.

Oh! I see the zippertits are at it again. Wonderful.

zippertits by tinyleed August 18, 2022

zipperection 

The bulge formed in a man's genital area, caused by sitting down with jeans. The zipper bunches up, forming an erection like bulge, which can scare and excite all who are there to witness it.

"FUCK, IT'S JUST CAREERS CLASS DON'T GET ALL EXCITED ON ME"
"Calm down man, it's just a zipperection."
"Oh. Haha, it's pretty funny."

zipperection by Please listen to black metal April 5, 2006

zipperback 

A type of hat that gives the rear of the hat a much cleaner look. Instead of being adjusted by a strap or snap, it is adjusted with a zipper. The zipper may very well be one of man-kinds greatest inventions next to duct tape. The zipper may be easily adjusted for personal comfort. Overall, better than strap and snap backs.

Mike - "Did you buy another snapback?"
Steve - "Calm down, this is a zipperback"

zipperback by Steeve909 July 12, 2014