"Hey, did you see the girl with the jacked up face on the treadmill?" - said Sam
"Yeah, talk about catz'n a bag!" - replied Richard
"You're an idiot - cried Sam
In the gameStarcraft II, a "Catz Forge" is where a Protoss player starts an upgrade and lets it progress to 95%. The player will then destroy the only pylon powering the forge, thereby stopping the upgrade from finishing.
Any video game controller that isn't a part of that system's brand controllers. If someone owns 4 controllers for a video game system, statistics show that at least one of these controllers is a Mad Catz, because they're much cheaper than the actual brand controllers. All Mad Catz for every generation of controller includes a turbo button, which royally fucks you over if you ever touch it.
NOTE: Despite the company that the "makeshift" controller comes from, it is still referred to as a Mad Catz controller.