Dreaming of beating someone you know is a kind of warning about future as per dream meaning and interpretation. The dream means unexpected changes and staying away from current location due to a problem created by you. Dreams of beating someone you know mean anger, frustration, prejudice, financial damage, accident or problems in business or unhealthy competition in career.
Dreams of beating someone you know and you getting beaten back means you will face problems from opposite sex, fight with friends or neighbors or you will be blamed for something you had not done.
Dream of beating someone you know in an unknown place means you can expect change of residence or transfer to an undesired location. It also means your intelligence getting clouded by anger and resulting in serious problems.
Dreaming of beating someone you know and see family members or friends means you will face problems in relationship. A friend or relative might cheat you. It also means difference of opinion in family will turn serious and ugly.
Dream of beating someone you know and you see strangers or authorities mean you will do unwanted things which will spoil your career and life. You might also be asked to change the current residence or job.