half-cousin-pibling

Parent's half-first cousin.

My half-cousin-pibling is a good person.

half-nephew

Half-sibling's son.

My half-nephew is a good person.

half-nephew

Half-sibling's son.

Half-nephew.

Half-Play

A costume or cosplay that is not completed or incomplete because you accidentally left part of the costume back home.

Where's your cosplay? It's a half-play right now, I left the wig at home so I have to go buy another.

half-1C1R

half-first-cousin-once-removed:
1- parent's half-cousin
2- half-cousin's child.

My half-1C1R is a good person.

Half + Seven

basically the idea that an age gap is fine, as long as the younger is half the olders age plus seven years.

"Dang doesn't she look a little young for Jim?"
"Well, ya know what they say, Half + Seven."

half-first great-cousin-niece

Half-first cousin’s granddaughter.

My half-first great-cousin-niece is a good person.