1 definition by aznrapsta

Top Definition
LNB
LNB is an acronym for Late Night Book. Book is in reference of the social network, Facebook. Late night booking is not defined by any time constraints, but is usually accepted as activity such as posts done between the hours of 2-6am. Anything past 6am is considered "Early Morning Booking".
Aaron is up all night LNBing.

Did you see that wall post? Looks like someone's been LNBing.
by aznrapsta August 07, 2009

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