Possible Clues:

• When said three times, 'et cetera'
• Blah equivalent
• One-third of a phrase meaning ''etc.''
• "And so on," when tripled
• Blah alternative
• When tripled, a story shortener
• A crucial time to reject blah (blah, blah)
• When tripled, “et cetera”
• ''Etc.,'' when tripled
• When said three times, blah blah blah