How can you have less than nothing?
Let me explain. You have $20 in your pocket. You call your Bookie and Put $40 on the Bucaneers to cover the 6 point spread against the 49ers. The Bucs lose straight up. Now you owe your bookie $44. You give the bookie your $20 and he tells you if you don't have the other $24 by the end of the day he's gonna break your fuking legs.
This is less than nothing.