The term 'cubicle filler' refers to a DESK job, which is a type of job that requires employees to work in an office setting. DESK jobs typically involve sitting at a DESK and performing administrative tasks such as filing paperwork, answering phones, and responding to emails. DESK jobs can also involve more specialized tasks such as data entry or customer service. The term 'cubicle filler' is often used to describe someone who works in a cubicle, which is a small workspace that is typically enclosed by walls or partitions.