you could hear the grass grow(ing)(redirected from hear the grass growing)
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you could hear the grass grow(ing)
It is so still or quiet that one would be able to hear even the tiniest, imperceptible sounds. I reckon you could hear the grass growing in the awkward silence that followed that dreadful performance.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.