To be checked on and/or watched by office personnel. Activity is most common to events in which people may be having too much fun or are getting loud enough for it to be obvious that work activities are not being performed.
To be caught participating in a non-productive activity.
John's doing another lap around the cubicles; we are totally being sharked.
Seeing any more than three people in a cubicle at any given time caused the office manager to shark the building.