A substance stored in an aerosol can used to repel both living and explosive and/or inflatable sharks. It is often found on bat-helicopters or whereever Batman thinks it would come in handy.
Batman finds himself with a inflatable, explosive shark latched to his leg.
Batman: Robin! Get me the shark repellent bat spray!
Batman: Robin! Get me the shark repellent bat spray!
by TheGammaGeek April 27, 2011