The word "gloppiest" is spelled with a double "p" in the middle because the "o" and "p" create a short vowel sound, represented in IPA phonetic transcription as /ɑ/ and /p/. The double "p" ensures that the "p" sound is pronounced with extra emphasis, making it more clear and distinct. Additionally, the "ie" at the end of the word creates a long "e" sound, represented as /i/. "Gloppiest" refers to something that is the most messy or sloppiest.
The word "gloppiest" is derived from the adjective "gloppy", which means messy, sticky, or gooey. The etymology of "gloppy" is uncertain, as it is considered to be an informal or colloquial term created through the modification of various words. However, "gloppy" could potentially be related to the word "glop", which refers to a thick or viscous substance. Due to its informality, "gloppiest" may not have a well-documented etymology.