Fig leaf

leaf of a fig tree; something which conceals or hides (usually insufficiently or inadequately)

A fig leaf is the covering up of an act or an object that is embarrassing or disagreeable. The term is a metaphorical reference to the Biblical Book of Genesis, in which Adam and Eve used fig leaves to cover "their nakedness" after eating the fruit from the Tree of Knowledge of Good and Evil.
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Noun
1. a leaf from a fig tree
(hypernym) leaf, leafage, foliage
2. a covering consisting of anything intended to conceal something regarded as shameful
(hypernym) covering

term for representations of nudes with covered genitals - hypocrite facility to avoid pornography accusations - employed under religious influence - compare kamasutra 

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n. ใบของต้นไม้ตระกูลมะเดื่อ; สิ่งปกปิดความผิด, สิ่งปิดเรื่องน่าอาย