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Typically said of an apartment building that has become a cooperative (or "co-op")—a building in which residents do not own property but rather own shares in the corporation that owns the building. I can't believe that our building is going co-op—I might need to move.
1. slang An initialism for "other people," referring to a cigarette given to one by someone whom one asked for it. He stumbled out of the bar going around to the people outside looking for OPs.
2. slang By extension, a person who asks someone for a cigarette. Cynthia doesn't smoke for the most part, but whenever we go out drinking she turns into such an OP!
A shortening of "photo(graph) opportunity," literally, an ideal chance to take photographs, especially of someone famous. The actors all got together for a photo op with fans at the convention. The CEO agreed to a rare photo op for the press.
See also: OP
a time or event designed for taking pictures of a celebrity. All the photographers raced toward a photo op with the president.
See also: OP
n. other people’s cigarettes; begged or borrowed cigarettes. (Initialism.) My favorite kind of cigarettes is OP’s. They’re the cheapest, too.