According to historian J. Winston Pearce, author of "Campbell College, Big Miracle in Little Buies Creek," the nickname's origin perhaps stretches back to the turn of the century when all but one of the school's original buildings were destroyed by fire. In the aftermath, Z.T. Kivett visited the school's founder and president, Dr. James Archibald Campbell, at his residence.
As Dr. Campbell bemoaned the fate of the institution he had worked 13 years to build, Mr. Kivett encouraged him, "Your name's Campbell; then get a hump on you! We've got work to do." Dr. Campbell thought that Mr. Kivett said, "You're a camel, get a hump on you." Hence the nomadic nickname.
http://www.campbell.edu/about/spirit-tradition/I'm going to try to incorporate "then get a hump on you" into my everyday speech...