flea bite
noun
1- a small red mark caused by the bite of a flea跳蚤咬的红斑。
1.1
- figurative a trivial injury or cost〈喻〉小伤口; 小笔花费：
the proposed energy tax amounted to little more than a flea bite.
提议征收的能源税充其量不过是一笔小费用。