slang for breasts, other times used to refer to women with big breasts or to make fun of a guy with this characteristic.
Man she has nice arbs.
Do you think those arbs are coming over for the party?
Dude, Jacob has arbs.
by Muarbs October 17, 2009

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arb
Short for 'Arbitrary' - this acronym is used more commonly where the context of the word implies the likes of the target object/subject being 'random', 'strange', 'unusual', etc...
What an arb picture - looks like the guy's head is out of proportion with the rest of his body! And what's up with that pink porche in the background? Must be a photoshop.
by Dimitri Pappas July 22, 2008

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arb
A little man, who is often extremely anal over his business.
It is usually used as a comparison but it can however be used as a term of endearment for a clever person.
You're more anal than ARB...
or
You're such an ARB
by Charlie Thoms February 27, 2004

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Arb
An epic typo by Mabinogi NA player "archranger" of the Alexina server. This word was meant to be "Narb" but he failed so epicly it turned out as "Arb" and the term slowly developed into the frequently used word we know today, ARB!
1). Eddward is an ARB at cross dressing.
by Refuserishere July 29, 2011

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A-anally
R-raped
B-butthole
I got an A.R.B man!
by bryce losch December 16, 2008

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ARB
an apparent reason boner (opposite of a NARB).
i was walking past a hot girl and got a ARB.
by wootz2 November 29, 2007

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arb
short for Protoss Arbiter from the PC game, StarCraft. The flying vessels provide invisibility to surrounding friendly units. They can stasis units to protect them from any and all damage, and can use recall to teleoprt units anywhere on the map.
Holy crap dude, that Arb just recalled 8 Reavers into my minerals.
by K Pittman September 03, 2005

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