Related Clues:

• Musty
• No longer edible
• No longer fresh
• Lacking originality, as a joke
• No longer novel
• Past the expiration date
• Like some clothes
• In need of freshening
• Like old bread
• Past the freshness date
• Past its prime
• 'Not too ___'
• No longer new or interesting
• Down-at-heel
• Thread-bare