The correct spelling of the phrase "most sleeted" is /moʊst slitɪd/. The word "sleet" means a mixture of rain and snow, and here it is used as a past participle. The "-ed" suffix indicates that the verb is in the past tense. The word "most" is an adverb that indicates that the action of "sleeting" happened to a high degree or more frequently than anything else. Therefore, "most sleeted" means something that has been subjected to a high amount of sleet.