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To be a Filthy Flirt; a man/woman who does not care about their appearance, body odor, or relationship status.
Did you see Jane at school today, she is so flirthy; she had the same shirt on for the past 2 months and she had the nerve to ask me out.

That flirthy old man just asked for my number while he was walking with his wife and kids.
by mikethemuscle April 04, 2011
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adjective - The combination of "flirt" and "filthy", one step down from sexting.
"She keeps sending me flirthy messages."
by lady8ast January 11, 2016
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