/fab/ [from `fabricate'] v. 1. To produce chips from a design that may have been created by someone at another company. Fabbing chips based on the designs of others is the activity of a silicon foundry. To a hacker, `fab' is practically never short for `fabulous'. 2. `fab line' the production system (lithography, diffusion, etching, etc.) for chips at a chip manufacturer. Different `fab lines' are run with different process parameters, die sizes, or technologies, or simply to provide more manufacturing volume.