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An initialism of "I couldn't care less," meaning one does not care about something at all. Used in text messaging and online communications. The boss thinks this will be some sort of great motivator, but ICCL if I'm honest. A: "Is it OK if I ask Dave out?" B: "ICCL. We've been broken up for nearly a month."
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.