The kk acronym simply means okay or message acknowledged.. It's the same as nodding in person or saying cool, gotcha, etc. It's common to see kk or KK as a text message abbreviation or when you're playing online games. Like other internet lingo, kk might also be heard said aloud in person, as kay kay.. Note: Most of the time, texting abbreviations like this are meant to be lowercase, like lol (laughing out loud) or brb (be right back).