slang
【正确答案】：Slang is a casual use of language that consists of expressive but nonstandard vocabulary, typically of arbitrary ,flashy and often ephemeral coinages and figures of speech characterized by spontaneity and sometimes by raciness.
【题目解析】：俚语是一种随意使用的语言，由表达但不规范的词汇组成，通常是武断的、浮华的、经常是短暂的造句和具有自发性的、有时是种族性的语言形象。
