Forget all about me

Noun: a friend who is usually only called upon by a friend when a more primary/prominent friend is unavailable.

Taken from the term “second string” in an athletic competition situation. In football, if the star quarterback gets injured during a play, the second string is called off the bench to replace him/her. A “Second String Friend” is essentially benched until needed, if ever.

Synonyms: Plan B, Second Choice, Secondary Friend, Benched Until Needed

The gender-neutral in between word for Sir and Ma'am (like in stan twitter talk), mixed with the British slang word known as "Fam".
Use when calling someone out or getting their attention when speaking to them like sir or ma'am but on stan Twitter, can be associated with people (he, shes they's, it don't matter) who act like brats but it really depends.
In honour of a British non-binary friend so that they can feel comfortable but also use stan twitter talk just in case "sir" or "ma'am" don't feel right.