Wrinkle a pool of spring water. The original description is that the wind blows on the water and the water waves ripple. Later, it was used as a two-part allegorical saying that had nothing to do with you or was nosy.
Do the most basic thing: participate. What do you care? Often used to laugh at nosy people.
Everyone sweeps his own snow, regardless of other people's frost.
One more thing is better than one less thing. Mind your own business, the less the better.