Wiktionary
n. cold pre-cooked chicken meat in a creamy mayonnaise-based sauce with herbs and spices, used as a sandwich filling or in salads.
Wikipedia
Coronation chicken is a combination of precooked cold chicken meat, raisins, herbs and spices, and a creamy mayonnaise-based sauce which can be eaten as a salad or used to fill sandwiches.
Usage examples of "coronation chicken".
Ten seconds later they were followed by Simon Harris, with Coronation chicken all over his beard.
Here am I, they say, a mere wholesale fishmonger, at the controls of a giant airliner because as it turns out all the crew had the Coronation Chicken.
Following a marvellous dinner of Coronation Chicken prepared by Mrs Hudson's fair hands, we shared a bottle of port whilst Holmes smoked his old clay pipe and I savoured one or two of the many different types of cigars which he kept as reference material should he discover cigar ash at the scene of a crime.