Abbreviation of "Open Beta" referring to a software that is open for evaluation; Blackbox-testing.
When will the OB start for that new mmorpg?
by Fraggleroc December 6, 2007
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"Old Balls" usually used to make fun of someone because of their age, or on their birthday to make them feel old.
"Hey Ryan you have OB now that your 25"
by pobcat March 22, 2010
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Older Boy. similar to Older girl or Little boy. if you are a girl and you are going out with and older boy OB.
I think i am going to the party, there will be OBs.

Are you going out with an OB?
by pooismylife May 18, 2011
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when will they announce the date for OB?
by FreeDrone August 23, 2013
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This stands for Outlaw Biker. An Outlaw Biker is the type of guy the girl of your dreams goes and fucks because you're too much of a pussy to take control of your "relationship" with her. Most of the time he is either unemployed, has a substance abuse problem, or has callous "dating" habits. A combination is certainly possible, too. Commonly used to conjunction with "IW" or "intellectual whore" which is exactly what you are if your dream girl fucks OBs then cries to you about it.
Last night I told Jane that I loved her and I'd do anythng for her. She said "let's just be friends" then went home and fucked an OB she met at the bar. She called me up later to cry about it, and I listened to her because I'm a nice guy/IW.
by Cardinal November 5, 2007
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his shoes are dirrty and he wore that jersey yesterday..hes an OB dont talk to him
by gangstashawty187 January 28, 2004
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1: messed up. substandard. sucky. shitty. no good. derivative of Out of Bounds. used to describe any and all unfavorable situations, events, people, etc...often exclaimed in astonishment.

2: "Man, I can't believe that!" = "dude, that's ob!"
DJ1 - "Hey man, I just accidentally spilled candle wax on your vinyl..."

DJ2 - "Dude.... that's OB."
by dj ik January 27, 2004
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