A placeholder journalists use when they need to find additional info in a headline or story. If you see this on a news website, somebody's made a mistake.
Auto collision on expressway leaves TKTK injured

The cause of death was determined to be TKTK.
by ttdi May 30, 2015
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"Tktk" is an offensive and derogatory response used with the intent of the recipient to not recognize it as an insult. Like flicking off an infant, or cheerfully cussing someone out in a language they don't understand.
Guy:"Dude, that jacket totally makes you look like Justin Bieber."
Dude:"Tktk."
Guy:"...?"
by Narutofan67 January 13, 2011
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