Definition & Meaning of "alphabet people"in English

What is the origin of the term "alphabet people" and how is it used?

Alphabet people is a slang term that emerged in late 20th-century English, particularly among conservative or mocking circles, to refer collectively to LGBTQ+ people. The name comes from the many letters in acronyms like LGBT, LGBTQIA+, etc., and the term was used to ridicule the perceived complexity or visibility of queer communities. It is inherently derogatory, intended to belittle, dismiss, or mock LGBTQ+ identities, and is considered offensive in almost all contexts.