When someone have a really stupid opinion but you don't have the time or energy to debate them so you just want to cut short the conversation and get some of the sense of moral superiority you would've get by proving them wrong.
"Pinapple on pizza is awesome!"

"let's agree to disagree"

"wow, you're so open minded!"
by 9852174563 February 21, 2018
Get the Let's agree to disagree mug.