BB means Bhuvan Bam who is a youtuber. Bhuvan makes comedy video himself then upload. Bhuvan has many characters in the videos which is he plays himself. He use some abuse in funny way which are often used by youngster. Bhuvan Bam is very famous on youtube. Thousands of youngster watch his video on youtube and like the videos. Bhuvan is also a good singer. In fact he came to be a singer. One day he put his video on youtube just for fun and people liked it so much. Then Bhuvan Balm started the BB ki vines. You can also watch the singing video of BB.