jacket boner 

The bunching up of a zipper so it appears as if you have an erection protruding from your jacket.

Jim had a jacket boner and we laughed at how small it was.

jacket boner by Trevor Cobbs March 24, 2008

Jacket boner 

A jacket boner is when your jacket zip pops up into the shape of a boner.

HAHAHAHAHA look that dood has a jacket boner

Jacket boner by connor holling September 12, 2019

boner jacket

Jacket made of erected foreskin.

Wow, Joey has one hard boner jacket.

boner jacket by The_Fondler March 9, 2016

jacket boners 

when you are wearing a zip-up jacket of any brand

and when zipped up it looks as if the zip line has multiple boners because of the numerous humps.
could also look like vaginas in extreme cases

Ugh stupid jacket boners

jacket boners by TheJacketKing February 18, 2011

jacketbones 

Some twink on tumblr who likes skeletons. He is fun, but also a simp.

Someone: hey what are you looking at?

A gay Undertale fan: Oh just this blog, Jacketbones.

jacketbones by Fingersinmyazzz November 9, 2020