A kipper was a type of food made from herrings, and was often eaten for breakfast.
In 1845, Lord Marlborough asked his servant to bring him kippers for breakfast. (COMIC: Unearthly Things)
The Eighth Doctor once claimed to smell kippers before discovering he was inside a time loop. (AUDIO: No More Lies)
The Eleventh Doctor and Alex once prepared kippers for breakfast. (TV: Night Terrors)