Echizen Ryoma says this all the time in Tennis no Oujisama, or Prince of Tennis. It's Japanese for 'too bad' or 'you're not good enough' or something along those lines.
mada mada dane, insert person's name here
by Sorix June 20, 2007
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no not yet or not good enough
It is a derogatory term, seen in many animes
Whenever Ryoma Echizen from prince of tennis wants to taunt someone he will say Mada mada dane.
by Sarah-chan January 7, 2007
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