If you dream that are being punished by flogging, it can mean that you are feeling guilty about something that you have done and are worried about the consequences of your behavior.
Flogging yourself in a dream can mean that you are engaging in self-destructive behavior in real life.
A dream that someone you know is flogging you can mean that this person has done something that you find intolerable.
Flogging someone else in a dream can mean that you want more control over others.
It can also mean that you are repressing a great deal of anger. Your dream could be telling you that you need to deal with your anger before it causes harm.
If the person you are flogging in your dream is someone that you know in real life, you could be angry with them but afraid to express your anger.
A dream that you are watching someone being flogged can mean that you need to be more considerate of the feelings of others.