Possible Clues:

• One way to describe the outfit
• The Buckinghams hit, ''Kind of ___''
• "What __!": "B-o-o-o-ring!"
• "Kind of __": 1967 hit
• 1967 hit "Kind of ---"
• "What __": "Ho-hum"
• 'What --!' ('How boring!')
• 'What ___' ('So boring')
• 'What ___!'
• "What —" ("Ho-hum")