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As in 10 out of 10, the best of the best. Used to describe any variety of people, places, or situations.
Hey I'm at this kegger right now and this spot is on TEN!
by Toohotferbitness August 24, 2010
To be overly excited, happy, killing it, making magic happen, best moment ever. A 10 out of 10.
"I'm on Tens!" or "You're on Tens, man"

('man' is optional, drop as needed)
by OysterPoodle July 27, 2011
Very extreme body odor.
Your breath is on ten!
by slym February 22, 2003
extremely upset; pissed off.
When I received my phone bill and saw the high amount, I was on ten!
by Anonymous September 25, 2003