LGBO adjective 1noun 1forms 2 adjective1 •(old-fashioned) Being a sexual minority, or related to sexual minorities as a class of people.But Chester Street is hardly a gay bar, is it? Just because it's a disco place and there isn't anywhere else much for an LGBO person to go in Chambana? — 1990 noun1 •(old-fashioned) A gay person or other sexual minority. formsLGBO's · LGBOs