mid-14c., lousi, "infested with lice," from louse + -y (2). Figurative use as a generic adjective of abuse dates from late 14c.; sense of "swarming with" (money, etc.) is American English slang from 1843. Related: Lousiness.
实用例句
1. At Billy's Cafe, the menu is limited and the food is lousy.
比利咖啡馆的菜品选择有限，食物也很差。
来自柯林斯例句
2. I told them it was a lousy idea, but I was overruled.
