Dícese de los empleados que en jornada laboral se dedican a navegar por Internet por motivos diferentes de sus obligaciones laborales.

Wasting time, usually at work, using the Internet.

http://www.getsafeonline.org/

Cyberslacking is the practice of employees using the Internet or other employer-provided resources for leisure during work hours, contributing to inefficiency.

http://en.wikipedia.org/wiki/Cyberslacking