boner

n.

（阴茎）勃起状态；愚蠢的错误，令人尴尬的错误；

1. She made a classic boner and married a crook.
   她犯了一个大错误，嫁给了一个骗子。
2. I am afraid you have pulled a boner this time.
   你这一回恐怕是犯了一个愚不可及的大错。

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