R.U. 

short for Retard Units, that is a unofficial synonym for "imperial measurements". As the rest of the world use metrics, the internet culture started mocking the medieval traditions of the Americans.

I'm 188cm tall, that's 6'2" in R.U.

R.U. by Alseimik March 5, 2018

R.U. 

Is a person who is fast as fast to fuck a girl and have a normal dick R.U. is good boy good in cooking lovely boy and such a handsome boy from Philippines.

Yo, r.u. is a legend mate

R.U. by Joriax June 9, 2021

r&u 

Read and Understood

R&U

r&u by kiss_of_kill November 8, 2013

R u 

It's the short version of 'are you'.

Chris: R u going out tonight?
Amy: No.

R u by YourFriendChris September 15, 2020

R.U 

Rest up. Used slang word abbreviation for rest in piece.

“Yo heard my man got done,, tell him i said R.u bro”

R.U by not_t October 18, 2020

r-u-n-n-o-f-t 

The condition of having left or abandoned someone or someplace, often abruptly, under difficult or unpleasant circumstances, and with the implication of not intending to come back. Colloquial misspelling of "ran off." The term is derived from the movie O Brother, Where Art Thou, in which an rather unlearned character wishes to convey to other characters that his wife left him but does not wish to say so aloud in front of his son.

Mrs. Hogwallop done r-u-n-n-o-f-t.

r-u-n-n-o-f-t by Edward January 6, 2004

R U RARTED 

The smart way to call someone retarded

This insult trumps all comebacks including but not limited to

No u
reverse
I know you are but what am I ...etc

Guy 1: Ur Mom Gay
Guy 2: No U
Guy 1: R U Rarted

R U RARTED by Green Wood Cememery June 6, 2018