porpoise poot

The act of going underwater with the exception of your ass and letting out a loud fart. Preferably in the act of an in water dive so as to time it in a manner that you fart as soon as the ass breaches the water. The way a porpoise clears it's blowhole to breathe and reemerge .

When in a pool and you have to fart there is a tough decision to be made. Do you blow bubbles or share with the masses and porpoise poot.