What does 'ICYMI' mean?

“ICYMI” means “In case you missed it.” It is used to point someone toward information, news, or content that was published or shared earlier.

The abbreviation is especially common in social media posts, newsletters, email subject lines, and online journalism. A publisher may write “ICYMI” before linking to an article, video, announcement, or event recap, signaling that the item is not necessarily new but may still interest the reader. The phrase is conversational and usually friendly rather than corrective.

ICYMI is technically an initialism because its letters are normally pronounced separately, rather than as a single word. It is often grouped with internet shorthand such as FYI (“for your information”) and TIL (“today I learned”), but its purpose is different: FYI introduces information generally, while ICYMI specifically resurfaces something the audience may have overlooked. Capital letters are traditional, though lowercase “icymi” is also understandable in casual messages.