The act of pressing ones lips against a transparent surface, typically a glass window, to form a seal and then breathing out to expand the cheeks.

Generally the intention is to disgust or taunt anyone that may be on the other side of the window. Although slightly less offensive, the action is performed in much the same manner as to chuck a browneye.

When you get a girl to lick your asshole and you fart in her mouth her cheeks puff out like a blowfish.

A blow job performed under water in a bathtub, pool, or ocean.

When a girl is getting eatten out, relaxes a little too much, and accidently lets a little fart out.

When you are eating a girl out and she quiefs in your mouth, thus puffing your cheeks out and making you look like a blow fish.

Getting a blow job while in a hot tub, or any other form of water. To be defined as a blowfish, the girl's head must be completely submurged under water, except to come up for air of course.

A woman who has had so many procedures done on their Boobs, lips, ass, and cheeks they look like a blow fish. Usually women who do porn or are over the age of 50 and aren't hot anymore.

The term "Plastic Bimbo" can also be used.