“NEET is a government acronym for people currently "not in education, employment, or training". It was first used in the United Kingdom but its use has spread to other countries, including Japan, China, and South Korea. People under the designation are called NEETs (or Neets).
In the United Kingdom, the classification comprises people aged between 16 and 24 (some 16-year-olds are still of compulsory school age); the subgroup of NEETs aged 16–18 is frequently of particular focus. In Japan, the classification comprises people aged between 15 and 34 who are unemployed, not engaged in housework, not enrolled in school or work-related training, and not seeking work. The "NEET group" is not a uniform set of individuals.”
The US terminology is Boomerang, and defines it as a person out of work who moves back home to their parents; the US populous treats this act in a very negative light even though it is becoming more common.
Many NEETs have attempted to break away by using their creativity to start companies, move to freelancing, and eventually being hired by a company. That’s why I like the “NEET” term better than “Boomerang” (sure boomerangs break out too) but NEETs seem to be more creative.