Is it possible to be addicted to being a bully or putting people down?

My mother was an incredible bully, constantly putting certain (not all) people down. I don't think she would fit the mold of a narcissist because they believe they are better than everyone already. Rather, she had a need to be better. Consequently she would put people down - usually targeting those already weak in self esteem - to make her feel better for her own inadequacies. I am convinced she was addicted to doing this; that it gave her some sort of high to make herself feel better at the cost of others. I'm certain she enjoyed this.

Anyone else's thoughts?