cs188 is a well-known early YouTube Pooper. He is mostly famous for his Pooping the Charts series, in which he makes fun of the current music hits such as Nickelback, however due to copyright claims they have been getting blocked or removed, as of recently he has uploaded a brand new PTC video, the last watchable one being Vol. 100 - "or something idk whatever", uploaded on April 1st 2020.
More recently, he has also pooped U.S. President Obama to a high degree. He's also the creator or the Pooper who pushed a lot of memes in YTP that are still used today, such as the reversing "SuS" and "JoJ" jokes and the "HoH SiS" phenomenon, as well as several Poopisms such as Sentence mixing, Forward reversing, Stutter Looping among others, basically pioneering the Modern YTP. He's (Probably) also one of the poopers who started the Michael Rosen YTPs and Billy Mays pooping even though both have been dropping in recent months.
YT user Radicalfaith360 is known for re-enacting several of his YTPs as well.
He had recently come out of his YTP hiatus and made a few more in 2018, such as pooping the Flex Tape product line commercials and TV commercials in general, even showing the process during some of his earlier livestreams. When he's not making YTPs, he streams on Mixer and makes skits, reviews and self-YTPs on his second YouTube channel, "cs188creations".