Rollmops () are pickled herring fillets, rolled into a cylindrical shape, often around a savoury filling.<!-- for example? -->
Presentation
thumb|Rollmops, Christmas Eve table. [[Herring as food|Herring are important in Wigilia Polish culture.]]
The filling usually consists of onion and sliced pickled gherkin. Rollmops are often skewered with a cocktail skewer.
Rollmops are usually bought ready-to-eat, in jars or tubs. The brine additionally consists of water, white vinegar, and salt; derived from the words rollen (to roll) and Mops meaning pug or fat young boy. The form Rollmops () is singular, and the plural is Rollmöpse ().
In English, the term "rollmops" is often treated as the plural of the singular "rollmop". There is also a theory that the term "roll-'em-ups" became "rollmops." The form "rollmop herrings" is also attested.