no.
Rb is the symbol for the element, rubidium.
RB ???
RB as it is at this time
Rb
85.4678 is the atomic weight of Rb.
RB means random boner
The oxidation number of Rb is 1.
Their 1st String RB is Tim Hightower
Rb (rubidium) is a metal.
Tennessee Titans RB - Chris Johnson
My sister got RB for her bday, and the mic came with.