A spammer may refer to any of the following:
1. A spammer is a person who sends spam e-mails to someone else. It is common for the spammer to send the same or similar e-mail to a list of recipients multiple times over the course of several days or weeks.
2. In computer games, a spammer is a person that sends an excessive number of messages to a zone-wide or global chat channel during a short period. These messages are usually to sell an in-game item or recruit players to join their group or party.