User blog:Oopskskskskskgayman/MOGAI summed up (easy to read)

MOGAI is a proposed acronym that refers to people whose sexual or gender identity deviates from the standard. It is also inclusive of all lesser-known identities.

Although widely used as LGBT terms, MOGAI is rarely used and is most commonly seen online referring to lesser known identities that are often oppressed within the LGBTQ+ community.