Where you're nailing a chick up the can and she farts, causing the trapped air to cause a ballooning effect with your foreskin.
"Man, we went out for mexican food last night, and later on when I was rocking Judy's can, she gave me a Chocolate Blowfish!"
When a person catches there mates fart directly in their mouth and then blows it into another person's mouth.
Sally loves to give chocolate blowfish kisses on beans and cornbread night.