LBM
Loose Bowel Movement aka Diahrea, when you poo comes out wet and will never ever be wiped. This happens when you eat soups too much, try it I swear it works!
Farting a wet lump that oozes down your trousers is an LBM
by MagliteR February 15, 2006

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Top Definition
LBM
LBM is an acronym standing for Littlebigman. Littlebigman is a combination of symbolic words, little representing his phallic size, big denoting the size of his ego and man being a mockery of the lack thereof.
An LBM is a constantly talkative, girl-obsessed teen.
The LBM should be drug out into the street and shot after a very painful lovemaking session with a claymore antipersonnel mine.
<Eric> "Using a mobile phone can slash a man's sperm count by almost a third, new research suggests.
<Eric> A study found that radiation from mobile phones appeared to have a dramatic impact not only on numbers of sperm, but also their swimming ability or "motility".
<Eric> In both cases, levels were cut by about 30%. Reductions in sperm count and motility lower the chances of conception. "
--> Littlebigman has joined #hbo
<Konrad> Hey lbm, have a cell phone?
<Littlebigman> yah
<amaroq> thank god
by William October 29, 2004

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LBM
Too have many girl problems that are actually fake, and made up to make you look cool. IE: A wanna-be pimp. Very close in annoyance to K-Twizzy
"Hes just a little LBM, he'll never have any girls."
by DragonReborn July 24, 2004

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LBM
A little brown mushroom. Mushroom hunting slang.
LBM's are small and brown.
by rifteeeer April 10, 2008

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LBM
LBM is an irritating Teenage Soap Opera. Constantly complaining about his/her/its tummy, and non-existant girl problems, you can find LBM in his/her/its natural habitat of Victoria Secret, sniffing the bras.
LBM: It involved hands under things...
STL:STFU LBM
Eric: We told you to stop giving guys hand jobs!
by SanchezTheLlama July 25, 2004

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LBM
1.) To constantly talk about things you have no concept of.

2.) To be annoying and irritating right out of the box.
LBM...we don't care. No, we really don't care. In fact, I never want to hear you mention your girl problems ever again.
by Boxer July 19, 2004

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LBM
n. Someone who is annoying, and constantly talks about stuff which noone evens cares about.

v. To discuss a subject which everyone in the room finds extremely annoying and no one cares about
1. God, you frigging LBM. Just shut up.

2. Don't mind him, he's LBM'ing.
by Gutupio February 23, 2005

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