Originated as "sneh," a word used to say I dont care. The opposite of "Haba." Schnebly is also sometimes used as "Schnebly Hill Road," which is a street outside of Flagstaff, AZ. "Schnebly" and "Schnebly Hill Road" are often used in place of song lyrics that one does not know.
"Dude - do you care if I bang your cousin?"
"The girl cant help it, Schnebly" (sang to the tune of that Fergie song)