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Old fashioned bush.

The untrimmed pubic hair of a woman. See 1970s porn.
She wasn't much of a razor fan. When she dropped her panties, her OFB was so thick, I thought I was in the rain forest.
by TittyFace Jenkins June 10, 2009
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2
1. Online Flirt buddy. One with whom one has some degree of cybersex.
A common four-letter word starting with F is frequently substituted for Flirt.
Her OFB got cold feet when he heard she was coming to town.
by scotte61 September 05, 2006
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3
An expansion pack in The Sims 2, it's the third expansion pack for The Sims 2, released on March 3, 2006, which allows Sims to run a home or community lot based business. Aspyr released a port of the game for Mac OS X on September 4, 2006.
Sarah: "Hey Cassandra!! Do you have The Sims 2 OFB? I think that's one of my favorite The Sims 2 expansion packs."

Cassandra: "No, sorry Sarah i only have one expansion pack, it's The Sims 2: Nightlife."
by Oddles August 12, 2009
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4
Guy or girl who you use for sex only is your OFB
by xoxoK April 21, 2011
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5
Online Flirt buddy. One with whom one has some degree of cybersex.
A common four-letter word starting with F is frequently substituted for Flirt.
Her OFB got cold feet when he heard she was coming to town.
by scotte61 September 06, 2006
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6
Noun. acronym for the "Open for Business" sign - as in, eagerly seeking a relationship with the opposite sex. Most typical of single females in their mid to late 20's when their apparent lack of wanting to be alone becomes apparent to the untrained eye.
Dave: "That's weird, Eve just asked if I want to go to lunch on Wednesday. Didn't she just get out of a relationship with Adam?"

Russ: "About a month ago, and I had lunch with her last wednesday. Her OFB is in the window."
by Spike83 July 21, 2008
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7
OFB I have a test tomorrow that I haven't studied for yet. Im fucked
by hayder9990 July 07, 2011
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