1) the boogie man for criminals that will mutilate the ones that fuck with him or dont do as he says, then he will devestate the lives of all that persons family, friends, and anybody that knew that person that are still alive, if anybody tries to stop him he will kill them too, living legend (from the movie Usual Suspects)
2) one of the nicknames that lord infamous (the well-known memphis rapper) uses in his music
for both; listen to "I'm Losing It" by Lord Infamous off the Tear Da Club Up Thug's album CrazyNDaLazDayz (intro is a clip from the movie)- "you think you can catch keiser soze? you think a guy like that comes this close to getting caught and sticks his head out? if he comes up for anything it'll be to get rid of me, after that my guess is you'll never hear from me again"