The word "Flatlong" is spelled phonetically as /ˈflætlɒŋ/. This means that the first syllable "flat" is pronounced with a short "a" sound and the "t" is pronounced. The second syllable "long" is pronounced with a short "o" sound and the "n" is also pronounced. This word is not a commonly used term, but when broken down phonetically, it can be easy to understand and correctly pronounce. Remembering the correct phonetic spelling can help avoid confusion and miscommunication.