- the general population of inmates in a prison, or the cell blocks in which the majority of inmates reside: Gen pop has time to exercise in the yard four days a week.Administrators sometimes remove child molesters from gen pop and send them to solitary for their own safety.
- the general population, especially when considered as the default, as opposed to a distinguishable or designated subgroup: I had a rough transition to the gen pop after my retirement from active duty.An MMO that just drops players into gen pop without a tutorial level shows terrible game design.