sponge off

• • = sponge down
  • 揩去；除掉：

    She sponged the water stains off the table.

    她把玻璃上的水渍用海绵擦掉了。

  • 寄生于(某人)：

    She has been sponging off him for years.

    她靠他生活已有许多年了。