fig leaf
noun
1- a leaf of a fig tree, often used for concealing the genitals in paintings and sculpture（绘画和雕塑中常用来遮蔽阴部的）无花果树叶。
1.1
- figurative a thing designed to conceal a difficulty or embarrassment〈喻〉遮羞布：
the amendment was just a fig leaf designed to cover the cracks in the party.
这个修正案只是一块用来掩盖党内分裂的遮羞布。
词源
early 16th cent.: with reference to the story of Adam and Eve （Gen. 3:7）.