The spelling of the word "haddest handle on" can be a little confusing, but it can be broken down using International Phonetic Alphabet (IPA) transcription. "Haddest" is pronounced as /ˈhædɛst/, with the stress on the first syllable. "Handle" is pronounced as /ˈhændəl/, with the stress on the first syllable. "On" is pronounced as /ɑn/, with the stress on the single syllable. Together, the phrase means having the most control or understanding of a situation. While the spelling may be tricky, the pronunciation is straightforward when broken down phonetically.