don't pull any punches – speak in an honest and direct way without being tactful

不打虚拳 - 坦诚直言，毫不保留

例句：

The CEO didn't pull any punch when he told the board that the company was in trouble.

CEO在告知董事会成员公司处于麻烦之中时并没有打太极，而是坦诚直言。