You’re not going to get anywhere with that idea – you’re barking up a dead horse.
A mixed idiom from these idioms
Source of this Mixed Idiom
A tip-off from @sayitwithsocial – social media consultant.
She pointed us to this brilliant twitter thread started by Joe Jeffries here:
My dad used to amuse himself in meetings by noting the mangled idioms of his management colleagues. Here’s some he found in his 1995 diary – verbatim and brilliant. #copywritersunite pic.twitter.com/NGhFmXxeYz— Joe Jeffries (@_joejeffries) January 12, 2018Joe Jeffries