RNU 

secret association for the Real Niggers United.

a group of black people that are hard core gangstas and can really rap.
good break dancers.

i pledge allegiance to the RNU, and to the gangstas, one gang, under T-pain, with beer and weed for all

RNU by dinophant October 2, 2010

RnU 

Read and understood (Mostly used on forums etc)

On A Forum:

Admin: Theese are the rules......
Member: RnU

RnU by David Rayner April 11, 2008

rnub 

An adept and versatile DotA player, renowned for his high BG (beyond godlike) rate and 30+ kill streaks. In 2010, he formed the nub clan, consisting of gnub and jnub. Although no more, the trio were virtually insuperable in their prime, stomping both inhouse and pub games with ease. He now plays a two-man team with Cutie Sizzle, a seasoned dota veteran and highly skilled kser. As bonerous would say: rnub + sizzle = autowin.

Player one: This guy has a 35 kill streak, WTF?

Player two: He's pulling an rnub.

rnub by ragus October 4, 2012

Rnub Ass 

Its when someone says that they have a thick ass and a random thirsty girl hears that and starts to want that ass really badly

Guy: I think i have a thick ass
Girl:GIMME THAT ASS
Me: Lol a Rnub Ass

Rnub Ass by Chinese Walmart February 28, 2017

rnull 

a rare type of tree

Hey I just seen a rnull!!

rnull by Urban Dictonary.1 May 11, 2019