Live on (one's) (own) hump phrase obsolete
To live without relying on someone else for money, food, or support.
As soon as I had reached 18, I moved out of my parents' house and lived on my own hump.
Only when I start living on my own hump do I realize that it is difficult to live without depending on my parents.
This phrase conjures up the image of the camel, which is famous for surviving on the fat in its hump without feeding or drinking.