A rat king is a rare phenomenon where a group of rats' tails become entangled.
Rat King or Ratking may also refer to:
Fictional characters Rat King, in Adventure Time Rat King, in The Amazing Maurice and his Educated Rodents Rat King, in Hilda Rat King, in The Penguins of Madagascar Rat King (Teenage Mutant Ninja Turtles), in the Teenage Mutant Ninja Turtles multimedia franchise Rat King (The Last of Us), in The Last of Us Part II
Other uses Ratking (novel), a 1988 novel by Michael Dibdin Ratking (group), a hip hop group from New York City Rat King, a 2012 Finnish thriller film by Petri Kotwica "The Rat King", 2015 season 5 episode 5 of Grimm "Rat King", 2012 season 2 episode 20 of Best of Luck Nikki (the Indian adaptation of Good Luck Charlie) , another English equivalent for the yakuza term
See also "The King of Rats", a short story prequel set in the world of the young adult trilogy The Sin Eater's Daughter by Melinda Salisbury King Rat (disambiguation)