The phrase "go on town" is a colloquial way of saying "go to town" or "go into town." In phonetic transcription, the pronunciation of "go on town" is /ɡoʊ ɒn taʊn/. The "o" sound in "go" is pronounced as a long vowel, while the "a" in "on" is pronounced as a short vowel. The "ow" in "town" is pronounced as a diphthong, with the "o" and "w" blending together. This kind of informal language is often used in everyday conversation and can vary in pronunciation depending on the region or accent.