Top definition
A wanker who is obsessed with (or believes they are part of) Japanese culture.
'The anime festival sucked - no cute asian girls, just wall-to-wall wanakas'.

'Hah! Cindy bought an "authentic" samuri sword online. Man, she's such a wanaka'.

Also, Gwen Stefani may be considered a wanaka.
by Desci February 21, 2006
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