名詞 crud:

1. heavy wet snow that is unsuitable for skiing
2. any substance considered disgustingly foul or unpleasant
   同義詞：filth, skank
3. an ill-defined bodily ailment

crud

n.（名詞）
Slang
【俚語】
A coating or an incrustation of filth or refuse.
污垢：污物或垃圾的覆蓋層或凝結(jié)物
Something loathsome, despicable, or worthless.
污垢，渣滓，可鄙者：令人厭惡、可鄙或無用的事物
One who is contemptible or disgusting.
卑鄙的人，令人厭惡的人
A disease or ailment, imaginary or real, especially one affecting the skin.
怪病：想象的或真實存在的疾病或病痛，尤指皮膚疾病
Sports Heavy, sticky snow that is unsuitable for skiing.
【體育運(yùn)動】 污垢雪：重而粘的雪，不適于在其上滑行

來源：
Middle English crudde
中古英語 crudde
possibly from Old English *cruden [past participle of] crôdan [to press, drive]
可能源自 古英語 *cruden [] crôdan的過去分詞 [壓，驅(qū)使]