Is there a keybaord shortcut to disable the trackpad?

When typing on the built-in keyboard of the 13" MBP is is very difficult not to inadvertently touch the trackpad and end up typing at the wrong point of the text.

OK one can disable the trackpad in accessibility options when a mouse is connected but then one wants to be able to use both scrolling systems simultaneously of possible. And anyway one often doesn't want to add a mouse just to disable the trackpad.

What would be highly useful is a keyboard shortcut to kill the trackpad, so you can re-enable it as and when needed.

Or if that is considered too risky then one that temporarily suspends the trackpad for say 15 seconds to allow you some thinking time while typing.

This would surely be a nice feature and one that would greatly enhance the user experience.

Surely it can't be beyond the wit of Apple to implement such a thing?

Or is there already a solution available?