The practice of making software run poorly on a compatitor's hardware.
nVidia's involvement in the development of Batman Arkham Asylum has gimped antialiasing performance on ATi hardware and PhysX performance on multicore CPUs. They should rebrand their developer relations program as nVidia: The Wat it's Meant to be Gimped.
When a large system is brought down by a single lame part, that is constantly the source of repeated failure, the system is said to have been gimped. People always want to replace the gimp, but it cannot be replaced. Gimping can also be applied to team sports.
The whole server system was running fine until it was gimped by the xyz. AGAIN!