couldn't agree more
idiomPart ofcould
couldn't agree more — idiom
1. used to express full agreement with someone — a way of saying you share exactly
1.idiom
Definition
used to express full agreement with someone — a way of saying you share exactly the same opinion
Example
"I think children should spend more time playing outdoors." "I could not agree more."
Christopher could not agree more with the idea of reducing plastic waste.