When you break wind and the sound that is made is very
reminiscent of
pulling on a zipper. As you control your
flatulence, you can speed up or slow down the quickness of the zipper sound to make it sound like you are pulling the zipper faster or slower which causes those around you to giggle more.
1. It sounded as if someone had unzipped something until the smell hit me and I knew it was a "zipper ripper".
2. Before I unpacked my luggage, I had to pass gas and as I
let it rip, I
forced it out quicker
giving it a quick unzipping sound, a "zipper ripper", and then unzipped my suitcase and laughed at how similar they both sounded.