mass noun
- a type of language that consists of words and phrases that are regarded as very informal, are more common in speech than writing, and are typically restricted to a particular context or group of people俚语：
grass is slang for marijuana "grass"
是“大麻”的俚语
army slang.
军俚。
with obj.
- informal attack (someone) using abusive language〈非正式〉辱骂, 漫骂（某人）：
he watched ideological groups slanging one another.
他观看着不同意识形态的团体相互辱骂。
词源
mid 18th cent.: of unknown origin.