This expression is usually yelled by a third party when someone gets chumped out by someone else. Typically this is a heckle that adds insult to insult. Similar to shouting "CHUMPED" or "BURNED" or something like that. This usually results in an uproar of laughter.

It is a reference to the face of the person who just got told. Their face may appear to be tight because they want to cry or are extremely mad.

Marginalized Orientations, Gender identities, And Intersex. it’s meant to be an all inclusive umbrella term for asexuals, homosexuals, multisexuals, trans people, and intersex people. Alternative to LGBTQIAP+
Alternative to MOGII, easier to pronounce.

the face that someone makes when they get tight