This expression originated with the Royal Navy where stores or equipment were found to be damaged, wouldn’t work or could not be used for the purpose for which they were intended. The expression quickly found wider usage and is now applied to not just stores and equipment, but to organisations, designs even concepts. It can also be applied to co-workers if they are not doing their job properly and, in extreme cases, used as a put down where someone is a complete arsehole and unsuitable to be considered part of the human race.
In the youtube video called "smoking" by the comediankyle mooney, he references a drug such as purp scurp in such a way that makes fun of all the drugs, especially weed, that people do.
"Derd, take out some purp scurp so we can get super sconed"
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.