What does 'TIL' stand for?
Answer
Today I learned
“What does ‘TIL’ stand for?” — “Today I learned.” The abbreviation introduces a fact or discovery that someone has just encountered, often followed by an unexpectedly interesting detail. It is commonly written at the beginning of a sentence, as in “TIL that octopuses have three hearts.”
TIL became especially recognizable through Reddit’s r/todayilearned community, where users share sourced facts. The subreddit was created in 2011 and helped turn the abbreviation into a familiar piece of online vocabulary beyond older chat and forum culture.
A common mix-up is treating TIL as a statement about something learned today in a formal educational setting. Online, it is usually a conversational reaction and may describe a fact learned years after the event itself. It is also different from TL;DR, which means “too long; didn’t read” and introduces a summary.