What does 'playing God' mean?

The expression "playing God" is

normally used to refer to individuals who behave like supremacists.

It is when people behave as though they have supreme power and

authority over everyone else and where might/majority makes them

right. Playing God is an expression used to describe people who

egocentrically and unfairly impose their ideas/ideals upon those

whom they consider to be their inferior, forcing these weaker

individuals to submit to their autocratic authority.