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

Carolina nephson 

Dude from north or South Carolina wears beach tees or long sleeves shorts chain a hat and some boat shoes drives a clapped out truck and always camped out at myrtle beach

Hey look at the Carolina nephson he got a nice shitbox.

Carolina nephson by User6591 January 31, 2021

nephson 

Nephew/son meaning your father is your uncle meaning he had sexual relations with his sister your mother

Wow that dude looks like a nephson all inbread looking

nephson by blackcope February 8, 2017

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

Nephson 

The male offspring of one banging their sibling. Common in Eastern Kentucky.

I’ll be damned if Jebadiah and Jeanna done had theselves a nephson. He’s gotta be a proud Uncle Daddy.

Nephson by Qthaking April 8, 2018

Nephson 

The term that best describes Hamlet in Shakespeare's play, Hamlet. His father's brother married his mother, making his Uncle Claudius now his father. This means that Hamlet is both a nephew, and a son, or nephson.

Derrick: "Did you read Act 1 Scene 2 of Hamlet last night?"
Mark: "Yea, Claudius' nephson is going crazy. I guess that's what happens when your uncle marries your mom,"

Nephson by Shakesfear101 January 26, 2014

Nephew son 

A boy that was a result of artifical insemination but was born to the partner of a sibling.

Coined by William from "Girlfriends" to explain that his sister's son was born to her girlfriend who was inseminated by William. Usually comes up when William has to shop or participate in some activity. i.e., "I went to the park with my nephew son."

Nephew son by Liz Kupcha January 15, 2009