Are you. Part of the movement to reduce unnecessary letters in words mostly brought about by texting. Can be use in either upper or lower case.

Really Cool.

A versatile word that can be used in several situatons to mean several different things.
1. use it as you would any other cuss word i.e. Oh, ru! I forgot to bring that.
2. Use it to describe something totally awesome. i.e. that was so ru!
3. Russian
4. Raza Unida (Gang)

RU is short for Rutgers University, the state university of the great state of New Jersey.

A versatile word that can be used in several situatons to mean several different things.
1. use it as you would any other cuss word i.e. Oh, ru! I forgot to bring that.
2. Use it to describe something totally awesome. i.e. that was so ru!

Lamer wannabe Canadian, German and Russian. Can't cut it in the military.

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.