Have you ever written something in an email or online and wished there was a way to make it perfectly clear that you were being sarcastic? It possibly says something about how close friends I am with sarcasm that I actually pine for a way to do this. And the thing is, there’s actually a punctuation mark designed for this exact situation! (I know, you’re excited.) It’s called the snark. 
Also called the Percontation Point and the Irony Mark, this one’s used to indicate that there’s another layer of meaning in a sentence. Usually a sarcastic or ironic one. So it is essentially a tool for smart people to use to make stupid people feel even stupider. Which makes it the best punctuation mark of all. — Jack Shepherd
In my ongoing mission to… punctuate things… Yeah, no, that’s not exciting. In my ongoing mission to be frivolously sarcastic at random… I present to you this delightful piece of punctuation. Go forth and… annoy people with it.
If you want to play with other punctuation marks that no one will understand and therefore are basically useless, this site will walk you through a few of them. Including the interrobang (probably the most familiar of the group) which they describe as, “the glorious punctuational equivalent of saying OMGWTF?!” Come on, how can you argue with that?
platform thing 
wolflullaby
03/01/2012
Bah…. I couldn’t find a snark in MS Word’s insertable symbol.
How could they leave it out‽
Kandace Mavrick
03/01/2012
This, it turns out, is because it doesn’t have a unicode. Which basically makes it impossible to use. This is A Very Sad Thing. Clearly we should be influencing the committees behind these things and pressuring them into including useful punctuation instead of just emoticons that do not adequately express “I AM BEING SARCASTIC HERE, DUDE”.
Wendy White
03/01/2012
This is my favorite thing about my current job. Everyone there, bar one, uses a constant string of sarcastic remarks for everyday communication. I never have to worry about being misunderstood, which I constantly had to do at my last job. Most Scitech
behind-the scenes-staff are a bit like Pratchett’s dwarves. Especially… Nah, better not single out departments 😛
Kandace Mavrick
03/01/2012
Clearly you work in an excellent environment. Everyone in my workplace is constantly sarcastic too. But then, ‘everyone in my workplace’ is basically me (and sometimes a Paul or two) so…
Declan Chellar
06/01/2013
The unicode for the snark is 2e2e according to this document: http://www.unicode.org/charts/PDF/U2E00.pdf
Kandace Mavrick
06/01/2013
That’s brilliant. Thank you!
My Apple character viewer brings it up much more clearly.
Brussels sprouts are the best⸮
Now to punctuation evangelise to everybody…
Declan Chellar
06/01/2013
Oh, I love brussel sprouts.ˢ
That’s it from MS Word. You can search for it by typing “2e2e” into the Character Code field in the Insert Symbol dialogue box.
Unfortunately, because it lacks the dot it looks more like a superscript ‘s’ than a reverse question mark.
Declan Chellar
07/01/2013
Wow! We both make ironic comments about brussel sprouts!
Your comment had not shown up yet when I submitted mine.
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