Definition of me-tooism in US English:

me-tooism

noun

US
informal, depreciative
  • The practice of adopting or imitating a policy successfully or popularly proposed by a (usually rival) person or party; (more widely) the practice of following a popular trend.

Origin

Late 19th century; earliest use found in Life. From me too + -ism.

Pronunciation

me-tooism

/miːˈtuːɪz(ə)m/