Moofer stands for "mobile out of office worker". An individual working outside of typical office setting is called a moofer. Such an employee is on go and can work in any place as long as there is high tech equipment connection, or a ready Wi-Fi network. This type of worker is becoming more common these days with the improved communication technology.
Companies prefer such arrangements since it reduces their overhead and also provide flexibility for the employer and employee. Columnist, bloggers and others who can work from their laptops are moofers. The term can also refer to people who travel or are out of office for most part of the job like reporters, consultants or businessmen who visit clients to make deals.