The story
Initialism of lesbian, gay, bisexual, transgender/transsexual, and other. Used mostly on Usenet communities such as soc.motss. Expansion of earlier LGBO to explicitly include trans identities.
Etymology from Wiktionary, CC BY-SA 4.0.
LGBTO
Today it means: Being a gender or sexual minority, or relating to these classes of people. Full definition →