The spelling of the word "most winging" can be confusing, as it seems to break some common English language rules. The correct pronunciation is /moʊst ˈwɪŋɪŋ/ (mohst WIN-ing), with the stress on the first syllable of "winging." The "i" in "winging" is pronounced as a short "i" sound. The word "most" serves as an intensifier, meaning "very" or "extremely." Despite its unusual spelling, "most winging" is a proper phrase in English that can be used to describe an action that is particularly intense or exaggerated.
There does not appear to be a widely recognized dictionary definition for the phrase "most winging."