Top Definition
A shirt that has a zipper that goes across the breasts, which when opened, will expose them.

This is not something that is available in stores, but if you are fortunate enough to know someone that likes to design their own clothes, you may ask them to make one for your girl, wife, etc.

True Story: My sister received a shirt from her good friend that wants to be a fashion designer. The first thing that I noticed about the shirt, is that it had a zipper that went across the chest. I immediately termed it as a "Boob Zipper". I have joked with her about having her friend make one for my wife. Well, maybe I was not totally joking. I would like it very much. :)
That Boob Zipper Shirt is HOT.
by Mandalorian72 January 03, 2010

The Urban Dictionary Mug

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