A small, flat, wingless insect living and feeding on the bodies of animals or men.

【虫】虱。

Any of various other insects, crustaceans, and arachnids living on plants and animals.

寄生虫(通称各种重寄生于动植物的甲壳动物或节肢动物)。

Mean contemptible person.

【俚】卑鄙的人。

To botch.

【俚】弄糟。