My guy friend called me a dime. What does it mean?

Anonymous
I was telling my coworker/guy friend about my weekend at a bar my crush and his friend bartend at. Basically, my crush wasn't working, but his friend was. I was telling my friend how I kept it cool and was my natural silly/goofy self and hopefully his friend didn't say anything bad like I'm super weird or something. My coworker/guy friend said, "No. He will be saying damn dude she's a dime and quite the character". What does it mean to be a dime?
My guy friend called me a dime. What does it mean?
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