To make impure or inferior by adding extraneous, improper, or inferior ingredients. Intentional contamination, as in "cutting" a street drug with something cheaper in order to increase profit.

This is a pyro slang term used to describe something that is so dangerous that it is likely to maim or kill the person trying to make it.

Fuel and oxidizer that ignite spontaneously on contact. Most often used to describe certain rocket propellants.

Pyrotechnic material that is stored and transported as two (relatively safe) components, and mixed on-site before use.

This is a term used in chemistry to describe a solution where you have dissolved as much solid as the liquid can stand. If you add any more solid, it will just sit on the bottom.

Note that this usually implies ambient (room) temperature. Because if you heat up the solution, you can force it to dissolve more of the solid.

The exact atom or molecule that produces the desired color in a flame.