An endangered species of Ninja Rats, which have evolved over the course of 3 million years to surf on tsunamis and/or any other moving body (including but not limited to: Pokemon, Clairvoyant Gymnasts, Professional Riot Bacon Hunters, and Children to name a few) which frequently plague the small country. They have been hunted nearly to extinction for their really crappy singing and for rebelling against the Kool-Aid Man's Dictatorship over the country and for leading organized raids against nearby Villages, claiming over $4.3 Million in stolen 15th Anniversary Limited Edition Collectible Cthulhu Action Figures and Gummy Bears leaving 45 wounded.
when you go to the toilet and take a big dump and don't flush leaving abdi and he's friends to chill in bowl hence the somalianpool party.
example 1.
Guy 1: Hey Guy 2 i gotta go take a shit ill be back asap
*7minutes pass*
Guy 1: hey your toilet flush button isn't working
Guy 2: oooooh hell nooo, no somalian pool parties in this house go get a bucket and tell abdi and his friends the parties over and don't come back till they've all left.
example 2.
so I walked into this public toilet that was busy and there was this one cubicle that no one was using , so I walk up to it and before I could close the door behind me and use it, to my surprise there was a massive somalian pool party just chillin there.
Upon ejaculation inside the rectum, the seminal fluid mixed with the fecal matter proceeds to slowly drip out of the anus, similar to that of a Somalian tap