Literal translation
to fall from the fig tree
Meaning
to be caught completely off guard, a little disappointed
Explanation
In its first sense, being unpleasantly surprised on reading or hearing something, as in "when I read that, I toumbèri de la figuiero". In its second, looking naive and clueless, equivalent to just stepping out of the sticks, as in "he always looks like he just crawled out of his hole". The image of falling from the fig tree suggests a sudden drop from carefree ignorance into reality.