Replicator rations were an energy-conservation policy instituted on the USS Voyager, limiting the usage of the ship's replicators for each crewmember.
Shortly after the use of replicator rations was implemented on Voyager in 2371, Captain Janeway attempted to use one of hers to replicate some coffee, but was dissuaded by Neelix, who advised her to set an example for the crew by using restraint. (VOY: "The Cloud")
The next year, Lieutenant Paris started a gambling operation, wherein participants would attempt to guess the radiogenic particle count the following day at twelve hundred hours, using a pot of replicator rations. When Commander Chakotay found out about the game, he put a stop to it, stating that running a gambling ring was not appropriate behavior for a senior officer. (VOY: "Meld")
In 2376, Paris pleaded with Neelix for replicator rations so he could replicate a 2342 Mouton Rothschild champagne, a Terellian pheasant and a rose to celebrate his two year anniversary with B'Elanna Torres. (VOY: "Warhead")