The correct spelling of the word "most scraping" is /moʊst ˈskreɪpɪŋ/. This phrase is often used to describe a sound, such as the noise made when a scraping tool is used on a surface. The sound is pronounced with a long "o" sound in "most" and a short "a" in "scraping". The IPA transcription helps to clarify the pronunciation of the word, which can sometimes be tricky to spell correctly without a proper understanding of its phonetics.
"Most scraping" is not a word with a specific etymology. It appears to be a combination of the adverb "most", which means "in the greatest degree" or "to the highest extent", and the verb "scraping", which is the present participle form of the verb "scrape", meaning to rub or remove something with a scraping or friction motion.