The story
Initialism of lesbian, gay, bisexual, and other. Intended as a more inclusive alternative to the earlier LGB or GLB. Especially popular on the newsgroup soc.motss, where it was likely coined.
First known use, by meaning
- 1980s–1990s Being a sexual minority, or related to sexual minorities as a class of people.
Etymology from Wiktionary, CC BY-SA 4.0.