Barking up a dead horse

April 27th, 2019

Silent as a lamb

June 16th, 2017

Flogging a dead cat

April 19th, 2017

Falling on dead ears

January 24th, 2017

As blind as a dodo

February 10th, 2012

Dead as a pancake

February 4th, 2011

Barking up a dead tree

February 4th, 1999
You're barking up a dead tree.