Fish, it's in the deleted scenes, oddly enough... I bought a VHS of it that had deleted scened. Don't ask.
This is not a misquote, nor is it from a movie. But it is an actual quote from the "Terminator 2 3D" show that is still running at Universal Studios Hollywood, which features a combination of live performances on a stage, coupled with footage of Arnold Schwarzeneggar, Eddie Furlong, Linda Hamilton, and Robert Patrick. You can imagine how cool that still is nearly 18 years later.
This line is said by the Governator himself after he and a young John Connor are hurled from their Harley Davidson that's been hit by a robot-launched missile...
T-100: Let's bust a move.