Some of the early MRE main courses were not very palatable, earning them the nicknames "Mr. E" (mystery),[21] "Meals Rejected by Everyone",[22] "Meals, Rarely Edible",[23] "Meals Rejected by the Enemy", "Morsels, Regurgitated, Eviscerated", "Mentally ******** Edibles", "Meal Ready to Expel", "Meal, Ready to Excrete", "Materials Resembling Edibles", "Morale Reducing Elements", and even "Meals Rejected by Ethiopians" (in reference to the 1983-1985 famine in Ethiopia).[24] Some meals got their own nicknames. For example, the frankfurters, which came sealed in pouches of four, were referred to as "the four fingers of death".[22] Although quality has improved over the years, many of the nicknames have stuck. MREs were sometimes called "Three Lies for the Price of One": it's not a Meal, it's not Ready, and you can't Eat it.[25]
Their low dietary fiber content could cause constipation in some, so they were also known as "Meals Requiring Enemas","Meals Refusing to Exit",[26] "Meals Refusing to Excrete", or "Massive Rectal Expulsions".