so still you could hear a pin drop

so still you could hear a pin drop

Extremely quiet and still. After the boss's outburst, the meeting room was so still you could hear a pin drop. Waiting to see what happened next in the play, everyone in the audience stayed so still you could hear a pin drop.
See also: could, drop, hear, pin, still
Farlex Dictionary of Idioms.

so still you could hear a pin drop

 and so quiet you could hear a pin drop
Fig. very quiet. (Also with can.) When I came into the room, it was so still you could hear a pin drop. Then everyone shouted, "Happy birthday!" Please be quiet. Be so quiet you can hear a pin drop.
See also: could, drop, hear, pin, still
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • so quiet you could hear a pin drop
  • hear a pin drop, can
  • could hear a pin drop
  • rip-snorting mad
  • snort
  • get (one) where (one) lives
  • hit (one) where (one) lives
  • hit one where one lives
  • hit where you live
  • a man/woman with a mission