Short for "Very Brett Boston". When one acts VBB, he/she has displayed characteristics of going beyond what a reasonable person would do to avoid social interaction and/or awkwardness.
"Man, I dont think Tim saw me. He walked right by me and didn't wave, but I could have swore our eyes met at one point"
" I'm sure he saw you, he was just being VBB"
"Dude, why did Sheila move all the way to Silverlake when all his friends live in West LA?"
"She's being VBB, she wont have to run into anyone randomly there"