The nick Name for the Green McDonnalds in Sedona, Arizona. Sedona is known for its red rocks, so everything follows the theme of rocks, hence the McDonnalds being calld Rock Donnalds.
Freind: Dude, smoking weed all day in Oak Creek gave me the munchies. Lets stop at Rock Donnalds and get some Munchies.
Other Freind: Okay, but first we need to stop at the "rockGreens" (walgreens) for some eyedrops.