She skipped the insurance to save a few bucks on shipping, but when the package got lost, she lost thousands - that's being pound-foolish.

pound-foolish 是由 pound（英镑）和 foolish（愚蠢的）组成的复合形容词。pound 在这里象征"大钱"，foolish 表示"愚蠢的"。 pound-foolish 字面意思是"在大钱上犯糊涂"，用来形容"因小失大"的行为，即为了省小钱而损失大钱。这个表达常与"penny-wise"（在小钱上精明）搭配使用，形成"penny-wise and pound-foolish"这个完整谚语，对应中文的"捡了芝麻丢了西瓜"。