It's good to be me... again.
A crutch is like support. Assistance towards accomplishing a goal. A crutch makes it easier for you to accomplish your goals.No credit to OB, hes actually a crutch to Watson game
A ball & chain, an anchor, an anvil, or references to at least one appendage tied behind your back is more appropriate to the perception many (myself included) have of BO'b.