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1.
VBR
VBR stands for Various bitrate.
What's the bitrate of the song?
Approximately 224Kbps, it's VBR.
by JennyF13 October 05, 2006
 
2.
VBR
VBR = Very Best Regards

VBR is the acronym for the closing salutation, "Very Best Regards", commonly used at the end of letters and notes.
Dear Tom,

Congratulations on your job promotion.

VBR,

Mary
by Wordsmither January 23, 2013