看美剧学英语俚语：Come clean

Fannie

Come clean: To be honest with somebody about something; to admit something to someone, often regarding a wrongdoing that one has tried to hide. Confess everything, as in If you come clean about what happened I will promise to keep it to myself. [Slang; early 1900s].（表示和某人说实话，毫不掩饰）

中文释义：Clean 意思是“干净的” Come clean字面意思是“变得干净”，实际上它是“坦白承认，说出一切”的意思，也就是我们常说的“摊牌”。另外，通常表达对某人坦白时用：come clean with sb;表达对某事坦白时用：come clean about sth。例句：It was time to come clean with my mother（该是和我母亲说实话的时候了）。“摊牌”的另一个地道表达：show one's hand，原本是赌场的一个术语，表示一把全部压上，俗称“梭哈”，后来就引申为：坦白、摊牌。

扩展补充：我们再来学习几个关于clean的表达吧！先混个脸熟，下次见到就有印象啦！
1、as clean as a whistle（干干净净）
2、a clean break：（与人、组织、生活方式等）彻底决裂
例句：She wanted to make a clean break with the past.（她想与过去完全断绝。）