The phrase "haddest lot do with" is an archaic form of English that has largely fallen out of use. The spelling reflects the pronunciation of the time, which is why the word "haddest" is written with a double "d" sound (IPA: /ˈhæd.əst/). The phrase means "had a lot to do with" and was commonly used in the 16th and 17th centuries. Today, it is considered obsolete and is rarely seen or heard outside of historical or literary contexts.