The origins of the Chimichanga may be down to three options. I am grateful to know these important things.
Debate over the origins of the chimichanga is ongoing:
According to one source, the founder of the Tucson, Arizona, restaurant El Charro, Monica Flin, accidentally dropped a pastry into the deep fat fryer in 1922. She immediately began to utter a Spanish curse-word beginning "chi..." (chingada), but quickly stopped herself and instead exclaimed chimichanga, a Spanish equivalent of thingamajig.
Woody Johnson, founder of Macayo's Mexican Kitchen, claims he invented the Chimichanga (chim-ee-ch-anga) in 1946 when he put some burritos into a deep fryer as an experiment at his original restaurant Woody's El Nido. These "fried burritos" became so popular that by 1952 when Woody's El Nido became Macayo's the chimichanga was one of the restaurant's main menu items. Johnson opened Macayo's in 1952.
Although no official records indicate when the dish first appeared, retired University of Arizona folklorist Jim Griffith recalls seeing chimichangas at the Yaqui Old Pascua Village in Tucson in the mid-1950s.
Given the variant chivichanga, mainly employed in Mexico, another derivation would have it that immigrants to the United States brought the dish with them, mainly through Nogales into Arizona. A third, and perhaps most likely possibility, is that the chimichanga, or chivichanga, has long been a part of local cuisine of the Pimería Alta of Arizona and Sonora, with its early range extending southward into Sinaloa. In Sinaloa the chimichangas are small. In any case, it is all but uncontroversial that within the United States, knowledge and appreciation of the dish spread slowly outward from the Tucson area, with popularity elsewhere accelerating in recent decades. Though the chimichanga is now found as part of the Tex-Mex repertoire, its roots within the U.S. seem to be in Pima County, Arizona.