Possible Clues:

• '___-haw!'
• "__-haw!"
• "___-haw!"
• '-- -haw!'
• '__-haw!'
• "— -haw!" (rodeo cry)
• "— -haw!" (cowboy cry)
• "— -haw!" (oater cry)
• ' -haw!' (oater cry)
• ' -haw!' (rodeo cry)