Related Clues:

• Musty
• No longer edible
• No longer fresh
• Lacking originality, as a joke
• No longer novel
• Past the expiration date
• In need of freshening
• Like old bread
• Past the freshness date
• Past its prime
• No longer new or interesting
• Like several-days-old bread
• Too hard, as bread
• Flat, like beer
• Like unfunny jokes