Adj. An abbreviation of the classifieds/sales term "Or best offer". Used in the context of describing a man or woman who will take whatever he/she can get in the way of romantic companionship.
Melissa? She's a drunk with a lot of mileage on her. She's truly OBO.

Adam has slept with all of his friends' ex-girlfriends and now he's been hanging around that creepy, snaggletoothed, bettie page impersonator's house. Isn't she almost 50? Officially OBO.
by VRB February 28, 2007
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An instrument used while hunting to attract ducks. It sounds like a mating call, so male and female ducks go quickly to it.
"hey, were going hunting," "don't forget to bring the oboe."
by TheFrenchHornGuy March 19, 2004
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A woodwind that is very difficult to play and is best taken in small doses!
What's the difference between an oboe and an onion? Nobody cries when you chop up the oboe.
by Hallie Corson September 9, 2005
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A really painful long boner
That man has a huge oboe right now he might need a doctor
by Lachurs June 20, 2017
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On Behalf Of.
Representing o=communication on behalf of another 3rd party orginasition or body.
In written conmmunication: i.e. formal letter etc.

Signed: James Whistle. OBO Musical supplies Inc
by Jim Le Gros August 19, 2005
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A hobo with one leg and or one arm. -
The obo sat on the train car waiting for it to slowly chug away.
by Leanne Biv February 18, 2008
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An ill wind that nobody blows good.
Lynne played Telemann's oboe concertos at the concert.
by Cap'n Bullmoose April 30, 2005
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