The word use to describe a cute idiot. Someone you love so much but your way of flirting is by making fun of him. Obo describes someone who you can’t live without. Someone whose your best friend and you want them in your life forever and ever. Their apart of your everyday life and when you guys don’t talk your day feels incomplete. I Love you.
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.