Mex. Mx is a term used by non-binary persons and those who do not identify with the gender binary, which was initially discussed in the 1970s. Mx is the most often used gender-neutral term and is recognised by governments and other organizations throughout the UK. It is also used in North America, Australia, and New Zealand. People use Mx as an alternative to words like "male" and "female", without necessarily agreeing with any cultural or biological definitions of these terms. Some individuals may choose to be referred to as "she" or "he" even if they were born male or female; others may prefer to avoid such labels altogether. In addition to being used as a pronoun, Mx can also be interpreted as a placeholder name. This occurs when someone wants to sign up for services that require a first name or last name, but not necessarily both. For example, a person might register for an email account called "null" or "nobody". The usage of Mx as a pronoun and as a placeholder name grew in popularity following the success of the film The Matrix, which featured characters named "Neo" and "Morpheus". These names were originally intended for the main characters in those roles, but after many people began using them instead, they became popular symbols for anyone who did not fit into a narrow definition of man or woman.