Someone was telling me about one where you basically step on someone's ankle /shin with your foot, anyone know about a technique like this, basically like kicking someone in the shin but putting ALL your down on it instead.
Sounds like it's no more than just a stamping technique. We teach a sipa, which is a low line kicking technique. Many arts will have their own variation. It wouldn't work as a finisher, but is good for a way in.
I honestly don't understand what you mean? A trainer of mine once added that (in theory!) to a technique: You would stand a certain way on the foot and throw the other, to inflict more damage Something like that?