nieceter

When your niece becomes your sister after your parents adopt her.

My sister has real issues, and my parents have to adopt her daughter. Now I have a nieceter.

nieceter by Uncle Bro June 19, 2010

nieceter

When your niece is a product of incest between your sister and your father.

He was shocked when he found out his niece was fathered by his father, she is really his nieceter.

nieceter by gardenmyway December 28, 2015

Niecester 

A term used for a person that is a sister and also a niece

She is my sister and my niece, therefore she is my Niecester.

Niecester by Njen28 August 24, 2016

Niceterbaiting

1. Something people who are compulsively nice do but you still think of them as being assholes. Like really religious people who feed the poor but you feel like they are doing it to stroke their ego.
2. Secondary definition: Wacking it in Nice, France.

The charity event was a total sham, just a bunch of niceterbating socialites trying to buy their way into heaven.

that phony baloney dumb fuck gave my homeless ass a ham sandwich. I know he was just niceterbaiting though.

Niceterbaiting by CandA12345 January 3, 2026