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similar to the term kitkat, when four fingers are inserted in the anus and removed covered in faeces resembling a four finger kitkat. the difference is however that instead the whole fist is inserted and removed resembling something like a kitkat chunky. this act usually takes place with the person or persons shouting 'CHUNKY' whilst inserting their fist.
matt: CHUNKY!
ellen: oh do we have to? my arse is still sore from last time.
matt: CHUNKY!
ellen: oh go on then, be quick...
matt: i do love a good kitkat chunky !!
by russelh December 13, 2009
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