Niecphews 

The children of your siblings. aka, your Nieces & Nephews. A term to be used in place of referencing both sexes individually.

Our entire family will be together this weekend including the Niecphews!

Niecphews by "the Labeler" August 10, 2009

wray and nephews 

the most hardcore spirit one can find in a local pub, mostly weatherspoon branches. not for pussies.

yo dude, i have no will to live, wanna get sum shots of wray?

wray and nephews by TuBsy February 16, 2005

Nephewson 

When you impregnate your sister in-law and fool your brother into raising him as his own.

Person 1: I took my nephewson to the museum this weekend.
Person 2: Have you told your brother yet that its not his son?
Person 1: Nope.

Nephewson by Spiderbat September 22, 2011

niecephews 

the collective noun for nieces and nephews

If our niecephews aren't good to their auntcles, they will not be remembered in our will

niecephews by jmarcusn February 4, 2010

niephew 

One's nieces and nephews.

I can't go out tonight, I'm babysitting my niephews.

I have 8 niephews; 3 nieces and 5 nephews.

niephew by unkleB September 16, 2008

niephew 

noun: A niece or a nephew.
adjective: of or pertaining to a niece or nephew.

plural: niephews

http://www.askoxford.com/asktheexperts/faq/aboutwords/siblings?view=get

"I have four niephews: three nephews and a niece."

"Three of my niephews are my first sister's children (two sons and a daughter), and my fourth niephew is my second sister's child (a son)."

niephew by imperatrix March 27, 2009

Niephew 

When you don't know if you'll be having a niece or nephew.

I can't wait to figure out what my niephew is!

Niephew by Kjtheblogger June 3, 2017