a girl who is completely flat chested or has a flat ass or a combination of both.
"Man that chick is so flat, she is a complete wanka."
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Someone from South Africa who masterbates a lot.
"That Ron is such a wanka!"
"Oh, i think he was from england"
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A person who loves chocolate but is a complete wanker.
Derived from a combination of the fictional chocolate maker, willy wonka, and the word wanker.
Pete: Dude, got any more cadbury dairy milk? Then I'll head home to give percy a whack.
Allan: Goddamnit Pete you are such a willy wanka ...
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A spanky wanka is a British person whom always spanks his wanker. (Jerks off constantly)
Jon: hey you wanna go hang out with Pedro?
Mike: Not that Spanky Wanka