Bump- A specific place or vehicle(car bump) where you "bump" the object with your vehicle.
Grind- A specific fence or edge where you "grind" the objects with your vehicle.
Precision- A small place where you need to stop there with your vehicle.
Grab- A method where you get of your bike and with a combo you gét in it again.
BSM- Short for Bike Stuck Method, it's when you stuck your bike into something(generally the ground).
CSM- Short for Car Stuck Method, it's when you stuck your car into something(generally the ground).
MTB- Short for Mountain Bike.
Hope I helped :\