The term 'Ren and Stimpy et al' refers to the popular cartoon duo Ren and Stimpy, as well as other characters from the show. Ren and Stimpy were the main characters in the animated television series created by John Kricfalusi and aired on Nickelodeon from 1991 to 1996. The show featured a wide variety of characters, including George Liquor, Powdered Toast Man, Mr. Horse, and Muddy Mudskipper. The crossword solution for this term is DUOS, which refers to the two main characters, Ren and Stimpy, as well as the other DUOS featured in the show.