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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.
LNB by aznrapsta August 7, 2009
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Yeo I swear Shordys be playing too much I can’t lnb
Lnb by Gezzare March 12, 2020
Related Words
LNB • LNBC • LNBD • lnbk • lnbop • lnbt • TNB/LNB
Abbreviation for "Like nobody's business" which is a idiom meaning very well, very much or very quickly.
Used when doing something Like Nobody's Business.
Boys, I just downed that six pack LNB.
My mom can cook chocolate chip cookies LNB.
LNB by JG-LNB September 13, 2010
An acronym for a woman with long fingernails with whom is usually the object of a fetish in which her long nails stimulate sexual excitement.
That LNB over there has me so turned on right now
LNB by mahogany doors October 1, 2016
The Best Minecraft YouTuber
LNB Is The Best Minecraft YouTuber
LNB by BG Bee February 19, 2024
The LifeStyle, The Family, The Movement
Trusting No Bitch/Nobody & Loving No Bitch/Nobody
“Everyone is weird, All this fake Love & Fake Energy, Im TNB/LNB
TNB/LNB by SYÆZ February 15, 2022
Short-hand for a Late Night Booty Call, which has evolved to a primarily text message-based art form but, like "buying CDs" and "taping shows" the "call" portion has hung on in the popular lexicon. The LNBC involves contacting a potential or reliable hook-up toward the end of the evening, having fulfilled another social obligation or failed at hooking up with someone else through other means.
Dude, it's 11 pm - is that too early for the LNBC?
LNBC by Binswah April 30, 2009
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Respectfully 

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Ya mans is wild buns, respectfully. Respectfully he's washed.

After school, The Modells on Jamaica Ave was active. Respectfully.
Respectfully by john quan the first December 20, 2020
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