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Not Too Old To Be Cool. What someone says to a cool elder when the elder usually understands something, but doesn't get it THIS (for emphasis, not shouting) time.

Also said by an elder who is clueless about the meaning of a standard acronym.
Junior: LOLROFL
Elder: What does that mean?
Junior: Rolling On the Floor Laughing... gees mom! :)
Elder: NTOTBC
by Mamageek2000 April 14, 2010
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She thick but you can tell it’s a bbl
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