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1.Everyone wants to be number one, and number ten is the end of the scale. Not to be confused with "She's a 10!"

2.Something inferior or substandard.

3. Unacceptable
"I don't like Salley. She's number 10."

" That food was number 10."

"I don't want any of that, it's number 10."
by Keith Chaney September 19, 2006
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