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
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grass is slang for marijuana “grass”是“大麻”的俚语
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army slang .军俚。
〈非正式〉 辱骂,漫骂(某人)
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he watched ideological groups slanging one another .他观看着不同意识形态的团体相互辱骂。
" mid 18th cent.: of unknown origin."