playing sharks 

When someone decides to eat your food; so in return, you eat theirs.

Mutha fucka ate my sandwich! Guess we all playing sharks up in here!

playing sharks by djspeck August 16, 2016

playing with sharks 

used to describe a person who is crazy to the point of putting themselves in obvious harm's way for no reason. See also fucking with cobras

The cops were just about to let Ryan off with a warning before he made that crack about smelling bacon. That boy's playing with sharks.

playing with sharks by Michael T. Biffins October 24, 2006