The phrase "haddest get together" is spelled phonetically as /ˈhædəst ɡɛt təˈɡɛðər/. The word "haddest" is the superlative form of the past tense verb "have." It is rarely used in modern English and is considered archaic. "Get together" is a phrasal verb that means to gather or assemble, and is commonly spelled as two separate words. This phrase is often used to describe a social gathering or party.