Who is this Button for?
Negators, dismissers, rollers of eyebrows, and other esteem busters. 
Masters of passive aggression.
Those whose company usually lowers the mood.
Always remember that people can benefit enourmously from listening to your put-downs.
Bring it all down!
Something to consider
- Nasty People How to Stop Bing Hurt by Them Without Becoming One of Them by Jay Carter (Contemporary Books 1979) is a short but classic text on these folks.