The act of farting in your partners mouth while they give you a rim job to make their cheeks expand, then turning around and pressing both hands to their cheeks to force the air out into your own face.
I was gassy when we went at it last time so I decided to give her the old suburban blowfish to whiff my own brand.
The act of when you're eating a girl out and she farts in your mouth. You hide the fart in your cheek and you go up to her nose, put your mouth over it and blow the fart into her nasal cavity.
"Bro I was with this girl last night and she farted in my mouth, so to get her back I gave her a Chinese Blowfish"