What's R N B?

Rhythm and blues, often abbreviated as R&B or R'n'B, is a genre of popular music that originated in African-American communities in the 1940s.

What exactly is R&B music?

R&B, which stands for Rhythm and Blues, is just that — music that is rhythmic and has the soulful achings of the blues. In the '90s it was easier to distinguish if a piece of music was or wasn't R&B. However, defining the genre today has become somewhat of a challenge.

Is RNB a rap?

TL;DR: if it's modern music in the tradition of black american music (funk, soul, R&B, etc) and they sing through both the verses and the chorus, it's R&B. If they rap through the verses or through the whole song, it's rap/hip-hop.