When someone is taking a shower and you go into the bathroom and take a huge smelly shit. The smell circulates and mixes with the steam thus making a soupy shitty room, in turn making the shower taker gag and sometimes throw up. Also you leave the toilet lid up and don’t flush, so that the smell stays and the shower taker has to fight through the gagging and dry heaving to flush the toilet, making it an utterly amazing experience. Most of the time it’s a nice clumpy diarrhea, resembling a nice hearty can of beef stew!
When three people (excluding the person recieving the swirly)
Poop in the toilet, then dunk the persons head in the bowl. After making sure the person has recieved plenty of beef (shit) the three add the broth by urinating on the reciever of the swirly.