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Short form for "or best offer." Usually used in adds to let people know that the price of whatever they are selling is open to negotiation, and that they will accept the best offer if the asking price is not met.
I am selling a TV for $50 O.B.O.
by buy/sell/trademe June 07, 2010
49 10
Or best offer

Use in forum classfieds sections.
The chastidy belt is $30 obo.
by eulerfx April 03, 2004
1223 99
OBO means 'Or best offer' mainly used in classifieds, or websites such as craigslist.
craigslist posting: 'Selling Laptop for $400 OBO'
by melonmonkey889 April 14, 2011
105 43
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
64 119
òbò (pronounced ob-oh)- 1. In Yoruba Language (West African)- Means the female reproductive organ/ Vagina.

2. Could be used to refer to a female.

1. Her obo smells bad

2. That obo is fine
Meaning: That girl is fine
by Olumide April 16, 2008
49 163
1. opposite of a boner.
2. Non-erect penis
Father ray had an obo when he saw the ugly girl.
by uncle rub and shag nasty July 16, 2008
20 135
Obo Stands for Overseas Building Office, it is the new US office in charge of constructing and managing any US facilities in foreign countries.
The OBO mechanical inspector is kicking my ass cause i am late on schedule.
by Fred18 July 21, 2006
28 143