The green slime is called Rad Slime. It has not yet been added to the game, but, by using commands you can spawn it. The Rad Slime emits some radiation because of which you cannot stay too long near them. On the slime wikia it says it will be added in the
George Washington wore several different sets of dentures over the course of his lifetime, none made of wood. Instead, the dentists treating him would have used the cutting-edge materials of the time: bone, ivory, lead, brass, gold, and the castaway teeth of horses, donkeys, cows, and, yes, human beings.
It was revealed during The Phantom Pain that when Code Talker was taken from his mother he was given the English name of George. George is a reoccurring name in the Metal Gear series, with notable examples such as President George Sears, also known as Solidus Snake.