or k.-k. (kaiserlich-königlich), meaning "imperial-royal" in the Austrian and Austro-Hungarian Empires "kk", instant-messaging slang for "OK", an acceptance and indication that no further explanation is necessary KK-theory, in algebraic topology KK thesis, a principle of epistemology Krusty Krab, a fictional SpongeBob SquarePants restaurant K.K. Slider, a fictional character from the video game franchise Animal Crossing KK Super Mart, a convenience store chain in Malaysia See also K&K (disambiguation) KK Mladost (disambiguation) KKAY, an FM radio station in White Castle, Louisiana Kay Kay and His Weathered Underground, a Seattle band