个人觉得最贴近的口语表达是：It's not the fisrt time u're on glue, right? 这个看着已经比较委婉了，当然这句话的后面你能换用 blooper 或 boob，就是稍微粗俗了些，类似我们说的“你傻X啊”。 另外，意译的说法你也能说：It's not the first time u (awfully) screwed / wet it也算含蓄的，要是不含蓄的话，后面加些个咒骂的形容人很笨的名词就可以了，比如dickhead, retarded, douchebag之类的。 希望对你有帮助吧

So you actually haven't ever done one stupid thing?

you had committed a silly wrong,do you?