dig one's own grave

do something foolish which causes one to fail or be ruined

自掘墳墓，自己害自己

(as) silent (或 quiet) as the grave

extremely quiet

像墳墓那樣寂靜，寂靜無聲

take the (或 one's 等) secret to the grave

die without revealing a secret

將秘密帶入墳墓，至死保守秘密

turn (北美亦作turn over) in one's grave

used to express the opinion that something would have caused anger or distress in someone who is now dead

在墳墓中輾轉反側（表示認為某事會令某位死者發怒或痛苦）

Bach must be turning in his grave at the vulgarities of the twentieth century.

20世紀的庸俗趣味定會讓巴赫在九泉之下輾轉難眠。