The correct spelling of the phrase "wast on edge" is actually "wasn't on edge". The pronunciation of the contracted form "wasn't" is /ˈwʌznt/ in IPA phonetic transcription, with "w" pronounced like the letter "u" and the "s" and "n" pronounced with a weak, merging sound. The phrase means that someone wasn't anxious or nervous, contrary to expected behavior in a certain situation. It is important to ensure accuracy in spelling to ensure clear communication of intended meaning.