Strange meat

 is a food item found in Fallout 3. Strange Meat is actually human flesh. It can restore some of your Hit Points, but also gives you a small amount of radiation. You can only buy or loot it from hunters, who are often seen "hunting" lone wastelanders. Old Man Harris in Andale will reveal that Andale's residents are cannibals and strange meat is found in their residences. The shed in Andale has Wastelander corpses on a bench, obviously being butchered, and the nearby refrigerators contain Strange Meat, making the connection obvious.

Trivia
"'He [Conan] understood now the mystery of the strangers who had disappeared from the house of Aram Baksh; the riddle of the black drum thrumming out there beyond the palm groves, and of that pit of charred bones--that pit where strange meat might be roasted under the stars, while black beasts squatted about to glut a hideous hunger. The man on the floor was a cannibal slave from Darfur.'"
 * "Strange meat" might be a reference to the Conan novelette Shadows in Zamboula (also The Man-Eaters of Zamboula), by Robert E. Howard and published in Weird Tales (November 1935). From the story: