It's ironic that IDK once stood for "Ident-A-Kid," the largest child-identification program in the United States, but is now a popular acronym for "I don't know." Of all programs, I'd vouch to say Ident-A-Kid is definitely in the know!
It's become a big trend online with teens and young adults – among the many other internet slang words, acronyms and abbreviations they use all the time to get their point across faster and in less character space.
You can find lots more examples of this acronym in use by searching for it on Twitter and checking out how many people are tweeting it right now.
It just may be wise to avoid using it as much as possible when writing an email to your boss, a text message to your grandma or a Twitter reply to a loyal client or customer. While slightly older acronyms like seem to be popping up more frequently, the most important thing is to have fun with them and don't take them too seriously.
You can bet that as text speak becomes more widespread and the need to express ourselves quickly and more accurately via our devices becomes more of a necessity, people will come with all sorts of other weird, quirky acronyms that will probably catch on.
A more proper way to communicate the same thing would be to use words like In some strange way, however, using this acronym online is at least slightly more polite than writing it out as a full F-bomb in a similar way that people have been using "WTF" (What The F***) for years or are now using CTFU.
It's up to you to determine when it is or isn't appropriate to use it according to the conversation and who you're speaking to online or via text message. Use it whenever you want – on Twitter, Facebook, Instagram, text message or anywhere else as long as in the most laid-back or even humorous situations and conversations.
We've all grown accustomed to the online jargon, shorthands and acronyms that have developed over decades of Internet use.
Silly as they might be, most of us are guilty of truncating, abbreviating or misspelling words to save a few seconds here and there.
The jury is still out on whether the seconds have added up to much or not, but linguists have had a field day studying online lingual behaviors and their effects on offline writing and speech.
Nevertheless, it's interesting to look at how pre-Internet acronyms and abbreviations like "LOL" have taken on new meanings ("laughing out loud") with the introduction of widely popular Internet idioms.
It certainly may be a slightly more respectable option compared to dropping a full-blown f-bomb in a tweet or in a text message, but unlike other internet slang terms like Refrain from using this term in professional situations or when messaging people you don't have as much of a casual and carefree relationship with.