Jeopardy may have just unleashed its greatest category ever.
Alex Trebek went from game-show host to hip-hop MC in a recent episode when he quizzed contestants on their '90s rap knowledge.
The nostalgic lineup started strong, with Trebek busting out a line from "Insane in the Membrane" by Cypress Hill.
Veteran contestant Ken Jennings was brought back on the show for a special "Battle of the Decades" series. The longtime Jeopardy champ was on a roll, until the straight-faced host stumped all three players with a line from the Beastie Boys. Come on, y'all -- it's "Sabotage."
BONUS: The Jeopardy! Quiz With Ken Jennings