Do you know the expression “rotten apple”?
This metaphor is used in many countries.
Basically, a rotten apple is a bad individual among many good ones, especially the one that spoils the group.
You can also use “rotten apple” to talk about a person who is dishonest and therefore causes a lot of problems for the group they belong to.
One rotten apple in the basket will make the others start to root as well. So just make sure that to avoid “rotten apples” and most importantly be careful that you never take on that role.
And for the end, a little note about dreams, if you believe in that. To dream of a rotten apple denotes your lack of sympathy for people, especially the ones who’re not being honest with you. Your dream also represents a revelation of fake friends, breakups, or similar pain. It also signifies worries too.