Also found in: Acronyms.
humorous An initialism for "I could tell you, but then I'd have to kill you," meaning, if I told you this extremely confidential or sensitive piece of information, I'd have to kill you to ensure that you don't share it with anyone else. All she wrote back was ICTYBTIHTKY, so I guess I'll never know the big secret.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
I could tell you but then I’d have to kill youand ICTYBTIHTKY
sent. & comp. abb. a phrase said in answer to a question that one does not want to answer. Don’t ask. ICTYBTIHTKY.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.