Possible Clues:

• Meaning of 'Ich bin ein' in J.F.K.'s quote
• “Today __ man”
• Simon's '__ Rock'
• 1966 hit '__ Rock'
• '-- Rock' (Simon & Garfunkel hit)
• "___ Rock" (Simon & Garfunkel song)
• "Today __ man": stereotypical bar mitzvah announcement
• '___ Rock', final track on 'Sounds of Silence'
• "___ Rock" (Simon and Garfunkel song)
• '___ Rock' (Simon and Garfunkel song)