What does BBN mean?
Bye, bye now
Other definitions of BBN:
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How to use the term BBN:
There are no example uses of BBN at this time. We would greatly appreciate your contribution if you would like to submit your own!
More slang terms:

404
Clueless

IBIWISI
I'll Believe It When I See It

TTTKA
Time To Totally Kick Ass

SLAP
sounds like a plan