Oxford Cloth Buttondown. A type of business dress shirt favored by prep schools and adherents to the trad lifestyle.
He wore a slightly wrinkled blue OCBD underneath his shetland sweater and tweed jacket.
Obsessive Compulsive Braking Disorder. A disorder where the inflicted person continually, and for no apparent reason, steps and/or slams on the brakes of his/her vehicle. This disorder is inherent in the old, foreign and female sex.
Man 1: "What the fuck? This person keeps braking and there's nobody in front of him for miles!"
Man 2: "Yeah, he must have OCBD."