CTN
CTN definition by Slang.net
This page explains what the acronym "CTN" means. The definition, example, and related terms listed above have been written and compiled by the Slang.net team.
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CTN means can't talk now. It is a quick way of letting someone know you are too busy to chat. It may also be used in text messaging to let someone know you are currently unable to call him or her.
CTN has diminished in popularity since phones began giving users the option of a text auto response to incoming phone calls. However, it is still used by some when texting and popular for online chat when a user is unavailable.