louse

蝨子、虱複數為 lice

The doctor checked the children's hair for lice.

醫生檢查孩子們的頭髮上有沒有蝨子。

卑鄙小人、混蛋口語，貶義；複數為 louses

He's a louse for lying to his own family.

他竟然對自己的家人說謊，真是個卑鄙小人。

搞砸、弄糟口語，louse up

One careless mistake loused up the whole presentation.

一個不小心的失誤就把整場簡報搞砸了。