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"inside the beltline." it's a term referring to the people who live in Raleigh, North Carolina. It is where the houses are usually nicer and the property values are higher. It's opposite it otb, "outside the beltline," where the property values are low. people who live inside the beltline are usually of a higher class than the ones outside. Very powerful three letters, because whether or not you live itb or not is what you get judged upon in the Raleigh society.

For more information on the hatred of itb-ers towards otb-ers go to: www.itbinsider.com
Ex:

son: "dad I met a new friend at school today, he's really cool and nice but....

Dad: "but what?"

Son: "he lives outside the beltline"

dad: oh. too bad, if only he lived itb
by csfloverz34 December 04, 2009
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9
A term that refers to be In The Bed. This is a list of the most attractive men in the entire world! And a short list of women too! There is a list of extra attractive men which is referred to as ITFB (In The Fricken Bed).
Person 1: OMG, Cousin Jackie is the most ITB man in the world.
Person 2: uhhhh, of course he is.
by Cousin Jackie Wannabe July 21, 2013
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10
What a person says in prvacy to another person. I Took a Big Shit.
Paul; Hey dude guess what what..
Dane; what?
Paul; ITBS..
Dane; Youre disgusting..
by Carolynn Montoya March 01, 2008
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11
In The Bond.

Most commonly used on the popular greek community website TotalFratMove.com
Itb. Rep it til I die. Named my dog after a special drink. Sweet berry wine homos. Itb. Born proud raised proud. TFM.
by AXO Princess January 05, 2011
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12
In The Butt.
Getting fucked in the anus or asshole. ITB is used as a secret code for young men only to understand.
This keeps women from the knowledge that they gave up their ass not because of feel good sex but because of a score card the boys are keeping secretly.
So they do not have to say the entire "In The Butt" after telling another about earlier escapades fucking.
early morning hours two young men are talking:
Dude1: Dude! ITB?........
Dude2: Oh fuck yea! You know it. That makes five this month. Shhhh.... I think she is awake now.
by DoomDoomRacer June 18, 2011
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13
acronym for I'm the best.
"Ugh can someone open this bottle for me?"
"I will!"
"No, you suck at opening bottles."
"Itb!"
by GiNa PrInCEsS March 21, 2007
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