noun
Abbreviation of バイセクシュアル. Used as a noun or adjectival noun to describe a person who is bisexual. Common in casual conversation and LGBTQ+ contexts.
See also: バイセクシュアル
彼はバイだとカミングアウトした。
He came out as bisexual.
バイの友達に相談してみたら？
Why don't you ask your bisexual friend for advice?