centerfold

The single larger sheet of paper that forms the middle two pages of a magazine or other publication, folded so as to open wider than a standard page spread.

A large photograph printed on this sheet, typically in the form of a nude, or provocatively dressed, sexually attractive woman or man.

The person appearing in such a photograph.

My blood runs cold / My memory has just been sold / My angel is the centerfold

Any very sexually attractive person, who is therefore material for such a photograph.