Boi (plural: bois) is a term used within LGBT and butch and femme communities to refer to a person's sexual and/or gender identities. In lesbian communities, there is an increasing acceptance of variant gender expression, as well as allowing people to identify as a boi. The term may denote a number of possibilities that are not mutually exclusive:
A "boi" is (generally) the younger person who prefers older partners, and is the "boi" in a "daddy and boi" dating, relationship, or sexual situation, where "boy" and "boi", respectively, are used to differentiate between someone who is underage, and someone who just identifies as the younger who wants or needs someone older. In this context, "boi" can be masculine or effeminate, or anywhere along that spectrum, and some males identify as a "boi" well beyond their 20s, and especially so long as they are involved with older men. Often, though not always, a "boi" prefers the submissive role.
A younger person, possibly embodying stereotyped attributes towards casual sex and commitment in relationships, in contrast with the stereotype of the U-Haul lesbian. Bois may not identify as butch, regarding butches as playing a more powerful or responsible role – the "man of the house" – while a boi is still in a freer, younger phase.
A young trans man, or a trans man who is in the earlier stages of transitioning.
A term of endearment for butches by femmes. It may also be used in the gay community to refer to a younger person – bisexual or gay – who may have effeminate characteristics. The term can also be used by anyone who wishes to distinguish from heterosexual or heteronormative identities.