Gas followed by mass

Now see here folks, Gas followed by mass means to shart yourself.

You be having a great day and have the urge to fart.

Well let me tell you something. That's gonna turn your smile upside down in a matter of 1.2 seconds.

Because your anus erupts with the nastiest form of fecal matter that is so foul it poisons your undies and a three mile radius.

Well now let's hope you aren't anywhere important like on a date or talking to crush or else your fucked.

Guy 1: Man I was talking to this one hot chick at this party but I had some gas followed by mass!

Guy 2: Oh shit man that sucks. Even the devil finds that shit blasphemous.