The meaning of the Acronym RB is...

RB is

• Resident Bitch
• Richly Beautiful
• Rat Bastard
• Righteous Bitch

More Meanings For RB:

• Read Binary
• Rotate Buffer
• Reservation Bit
• Richard Bruce
• Registry Backup
• Rounded Box
• ROM Boot
• Remote Backup
• Randomized Block
• Real Beard
• Really Big
• Rubidium
• Rubidium
• Resistance Barrier
• Rubberized Base

RB is also in:

• Assembly
• Chat
• Chemistry
• Electronics
• File Extensions
• General
• Hardware
• Networking
• Telecom