dig one's own grave

1. 自毀生計
   He has dug his own grave.

   他是自毀生計。

make sb. turn in his grave

1. 使某人在九泉之下大為震驚
   His behavior would make his parents turn in their graves.

   他的行為會令他死去的父母在九泉之下不得安寧的。

(as) silent as the grave

1. 寂靜無聲的
   They were silent as the grave.

   他們靜默著，一言不發。

• dig one's own grave
  do something foolish which causes one's downfall.
• turn (N. Amer. also roll over or turn over) in one's grave
  (of a dead person) be thought of as angry or distressed about something had they been alive.