throw (one's) weight about
To assert oneself in a controlling, domineering, or authoritarian manner; to exercise one's position of authority, power, or influence, especially to an overbearing or excessive degree. (A variant of the more common "throw one's weight around.") An effective leader should inspire enough confidence in his or her team that they don't have to throw their weight about to get things done. I'm sick of Donald coming into these meetings and throwing his weight about. Can't he just leave us to our own devices?