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Pettanko is not a trope. UsefulNotes.Pettanko is a fanspeak term definition only. The tropes are A-Cup Angst (girl is sensitive about her lack of size) or Petite Pride (girl is proud of her flat-chestedness). Anything else is not a trope. Please return this example to the page under the correct trope if (and only if) it fits one of those two tropes.
Someone also needs to read Zero Context Example, too.
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