The correct spelling of the word "cushewbird" is actually "cuckoo bird". The IPA phonetic transcription for this word is /ˈkʊku bɜrd/. The word originated from the sound made by the bird species in the family Cuculidae, which is similar to the sound of the word cuckoo. The incorrect spelling of "cushewbird" is likely a result of mispronunciation or regional dialects. It's important to use correct spelling and pronunciation to ensure effective communication.