Related Clues:

• Like the invitation line 'Be there or be square'
• Like yesterday's donuts
• Old hat initially tarnished ceremony
• No longer fresh, as bread
• Not fresh, as bread
• Way past the sell-by date
• Humdrum, as humor
• Cliched
• Past the "sell by" date, maybe
• Stale, joke-wise
• Fresh no more
• Not longer fresh
• Like old beer or jokes
• Over-heard
• Like the expressions 'a dime a dozen' and 'a penny for your thoughts'