Neefed It Up 

To mess up or cause a failure, this term was popularised by the YouTube Channel Oliver Aged 24 (HowToDrawReallyGood ) where Neef (a previous student of his) would show some of his pieces of work that he created using the tutorial, they are always terrible and referred to as being 'Neefed up'.

"You have Neefed it up"
"You've really Neefed this up!"

Neefed It Up by JoeAged13 June 1, 2013

Neefy 

1) A relationship with your boyfriend/girlfriend that feel like you guys are best friends

2) a relationship that doesn't feel like you guys are dating, but it feel like you two are best friends

Having my boyfriend as my neefy is the best thing ever

I like having a neefy relationship. We can be our selves and we are comfortable around each other

Neefy by Benben ten ten February 2, 2019

Neefer 

neefer (neef, nef, or nefer) is a word that can be used at any time, anyplace, and have any meaning you would like. it can be a noun, verb, adjective, adverb, etc. its basically the neeferest word ever.

"oh my gosh, you're such a neef! i cannot believe you would do that!" or "wow, that's the neeferest thing i've ever heard you say; so inspiring" or "go nef a neef you neefer!"

Neefer by Mara Serpa May 19, 2008

Neefed 

1.The art of changing someone's facebook or myspace status to an out of date song lyric to make them look foolish and out of touch socially.
2. Being utterly creepy and getting domed up by heavy set women while trying to maintain the image of liking more attractive girls.

1. Dude, i left my face book open and totally got neefed. He changed my status to some lyrics from forgot about dre.

2. He took home a girl that's a thrower on the track team. She had to weigh at least 225 pounds. He totally neefed out last night.

Neefed by bigpuke/london October 20, 2009

Neefie

Daring but retarded

The best advice on rock climbing is not to be neefie.

Neefie by PorridgeJ June 3, 2019

Neefie Bellini 

A man sweeter than an actual Bellini, he is a Neefie Bellini. Sweet, a bit tart, perfect to enjoy in the morning or the evening. Always bubbly and delicious.

I’m in love with Neefie Bellini, he is the sweetest.

Neefie Bellini by Jessica♥️ November 23, 2021

Neeflet 

A non-gender specific word for neices and nephews.

I have 5 nieces and 3 nephews, therefore I have 8 neeflets.

Neeflet by Kalnoch May 3, 2011