To dream of a mammoth represents your feelings that something is dangerously bigger than you are. You may feel that a situation is too big for you to control. Parents or authority figures in your life that once they show up you are too insignificant to do anything except get out of their way.
Negatively, a mammoth may reflect feelings about behavior that is terrifyingly oversensitive about getting it’s way. Behavior that is terrifyingly oversensitive about it’s size or power being respected. Enormous power that is unprofessional. Terrifying over-sensitivity requiring respect for something you feel looks stupid, crazy, or irrational.
Example: A man dreamed of seeing a mammoth. In waking life he felt compelled to respect someone he felt was childish, ignorant, with the ability to cost his business money.