baka ka Share definition Flag baka ka is the japanese word for 'asshole' (not the part, the insult) when baka is used by itself, it becomes 'idiot'. someone is being a jerk, call him an asshole. say "baka ka!" baka ka by sensei April 19, 2004 0 0 Get merch Get the baka ka mug. Buy Now — $32.95 See more merch