Slang meaning
What does IDTS mean?
IDTS stands for “I don’t think so.” It is a soft no, or a sceptical reply, typed when you doubt something but don’t want to flatly say it is wrong.
Updated 6 October 2026
IDTS means “I don’t think so”: a mild no, or doubt that something is true or will happen.
What IDTS can mean
1. A mild no
The main use: an answer to a yes-or-no question. “Are you coming Friday?” “idts, I have work.” It says no without sounding slammed shut, because “I don’t think” leaves a small gap open.
2. Doubt about a claim
Used when someone says something you suspect is wrong: “She said it's free shipping.” “idts, it said £4.99.” Here it is closer to “that doesn’t sound right to me.”
How people use it on Instagram and Facebook
DMs and group chats
The most common home. It is a quick answer to a plan or a question, usually lower case and without punctuation. It is far rarer than IDK, so some readers will have to look it up.
Instagram comments
Replies to a claim in a caption or another comment. “Idts, that's not how it works” reads as a polite challenge. Without an emoji it can sound a little cool.
Facebook Marketplace and groups
Shows up when someone doubts a price, a stock claim or whether an item will still be available. It stays friendly there because it is hedged, unlike a plain “no.”
IDTS in real conversations
- Direct messagethink the shop is open on bank holiday?idts, they were shut last year
- Instagram commentthis will definitely restock tomorrowidts, they said end of the month
- Direct messagecan you do 8pm instead?idts, I have class till 9
- Facebook commentIs the sofa still available? They said sold yesterday.idts, I'll check and tell you
How to reply to IDTS
Questions people ask
What is the difference between IDTS and IDK?
IDK is “I don’t know”: you have no answer. IDTS is “I don’t think so”: you have an opinion, and it is a doubtful no. Mixing them up matters, because one is a shrug and the other is a refusal.
Is IDTS a firm no?
Usually it is a gentle one. The words “I don’t think” leave a little room, so it works as a polite refusal or a doubt, not a final answer. If you need certainty, ask a follow-up question.
Is IDTS very common?
Not especially. It is much less widespread than IDK or IDC, so people may read it as a typo. If you want to be understood by everyone, write the full phrase.
Should a business use IDTS with customers?
It is better to avoid it. A customer message deserves a clear answer, and a rare abbreviation that means “probably not” can confuse. Say what you mean in full, such as “Unfortunately that isn’t available.”
Related slang
- IDKAn honest shrug, a cushion before an opinion, or a quiet way out of a question: idk is “I don't know.”
- IDCIDC means “I don’t care”: either “I’m happy with whatever” or, less kindly, “this doesn’t matter to me.”
- IDEKIDEK means “I don’t even know”: a stronger IDK for when something is baffling or hard to explain.
- IKRIKR means “I know, right?”: a quick, enthusiastic way of agreeing with something someone just said.
- ionIon is slang spelling for “I don't”: “ion know” means “I don't know,” “ion wanna” means “I don't want to.”
- NVMNVM means “never mind”: forget what I just said or asked, because it is solved or no longer matters.
More slang meanings
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