Final answer:
In the Fantastic Beasts series, Muggles are called 'No-Majs' in the American wizarding community, differentiating from the British term.
Step-by-step explanation:
In the Fantastic Beasts series, which is a part of the larger Harry Potter universe, 'Muggles' are referred to as 'No-Majs'. This term is specifically used in the American wizarding community to refer to individuals who do not possess magical abilities, contrasting the term 'Muggles' that is commonly used in British wizarding society. The storyline of Fantastic Beasts expands on the wizarding world, created by J.K. Rowling, and introduces viewers to American wizardry culture and terminology, including this unique designation for non-magical people.