A collop is a slice of meat, according to one definition in the Oxford English Dictionary. The derivation is obscure; the OED cites that it may be related to the old Swedish word kollops (equivalent to the modern: kalops ), but also suggests a German origin (klops). Swedish restaurateur Tore Wretman derives the modern Swedish kalops from the English collops, which in turn is said to originate from Swedish word colhoppe (ember-hops, from how the thin sliced stripes of dried salted leg of mutton danced on the glowing hot skillet) that was well established in the Swedish language in the 15th century.
In Elizabethan times, "collops" came to refer specifically to slices of bacon. Shrove Monday, also known as Collop Monday, was traditionally the last day to cook and eat meat before Ash Wednesday, which was a day of fasting and abstinence from meat, and part of pre-Lenten activities. A traditional breakfast dish was collops of bacon topped with a fried egg. at Christ's Hospital, which was founded before the reign of Elizabeth the First, the word collops was used on the menu to mean stewed minced beef.
Lamb collops were included on the breakfast menu for first class passengers of the Titanic.