Possible Clues:

• Jersey greeting
• Heifer sound
• Bossy's big announcement
• Cry heard in a meadow
• Most of the general feeling coming out of Jersey, in a manner of speaking
• Something MacDonald heard
• ___ yang (Thai grilled pork)
• 'Knock, knock.' 'Who's there?' 'Interrupting cow.' 'Interru—' '___.'
• Sound during some drives
• Exclamation while driving past a herd of cows