Please state in which country your phrase tends to be used, what the phrase is, and what it should be.
Example:
In America, recently came across “back-petal”, instead of back-pedal. Also, still hearing “for all intensive purposes” instead of “for all intents and purposes”.
I say “I couldn’t care less”, but I used to think that “I couldn’t care less” was used in context where someone seemed like they don’t care and they give that as a snarky remark, implying that they can care even less.