the act of smoking a drug that is not in its sault form. (cocaine, meth, dmt). snortable cocaine is in its salt form which means it is linked with HCl. When you freebase it, you neutralize the HCl leaving you with pure cocaine. HCl is said to be the base so you "free" it from the "base"

The activity of smoking a specially prepared form of the drug cocaine. The crushed crack cocaine is usually placed in a spoon or a beaker where it is heated by a flame. The user inhales the fumes from the burning cocaine and receives their high from this.