One day, I walked into my office and casually asked a coworker how she was doing to which she responded, "Hanging on like a hair on a biscuit*."
I was tickled by the visual simile and promptly asked for translation to ensure my interpretation was correct.
Of the many changes I anticipated moving from New York to a small town in Tennessee, developing an arsenal of colorful southern phrases was not one.
Check out this list of idioms in other languages.
*Hanging on like a hair on a biscuit: Said when things are not great but could be much worse. Similar sentiment as, "I'm hanging in there."