An abbreviation of Spacecraft Tracking and Command station.
Although the 's' for the station is missing; it is withheld to let STAC be more speaker friendly. A ground station with capability to track space crafts may be reffered to as a STAC station.
the Strathclyde STAC station
Stupid Turkey Ass Cow ~(can be pronounced like stack)
Used when you really want to say you Stupid Turkey Ass Cow but for one reason or another you cant...like when you're at work
That STAC needs stop copying me and STFU already.