RBU may refer to: RBU (radio station), a longwave time signal RBU-6000 Smerch-2, a 213 mm caliber Soviet anti-submarine rocket launcher Rabindra Bharati University, Kolkata, West Bengal, India Ramdeobaba University, Nagpur, Maharashtra, India Rayat-Bahra University, Punjab, India Rock Band Unplugged, a video game