Lots of newer cars have complex ABS and stability control systems that can't be fully disabled, even if there's a button that seems like it should turn everything off. If you're in a situation where you need those systems totally defeated, that can be an issue. Luckily, there are still a bunch of workarounds you can try.
Wyatt Knox from the put together a video showing how you can mess with your car to disable those traction-aid systems. The first thing he suggests is to read your car's fuse diagram, and try pulling fuses related to your stability or traction control. It's best to pull one fuse at a time and test drive your car to see how it's been affected. Sometimes, when you pull a fuse, multiple systems can turn off, which might create an unfavorable situation.
Of course, if the fuses don't work, you can start unplugging sensors. Removing a wheel speed sensor will disable ABS—and sometimes, stability control. If your car has a yaw sensor, you can unplug that for results. You can also try simply unplugging the ABS module, though that could adversely affect your car's braking performance. If none of those things work, Knox has a few more suggestions, which he outlines here:
Of course, you shouldn't be unplugging any of this stuff for driving on public roads—these tricks are reserved for race cars or off-road driving, where electronic safety controls can be a hindrance. Don't attempt this stuff if you don't know what you're doing.