228: Its Wrpng U

Explanation
Twitter is a microblogging and social networking service in which each post, a "tweet", is required to be under a certain limit; this used to be 140, but this was increased to 280 (except for a few languages) about half a year before the publication of this strip. (However, this may have been a conscious decision on the part of the author, as the original strip was from 7 years before this change.)

One way to overcome the limitations of a character limit while still conveying the same information is to leave out letters that aren't strictly needed to get the word across. Another is by replacing words like "to" and "for" with numbers that are their homophones, i.e. "2" and "4". Yet another is by leaving out punctuation that can be inferred by the reader. None of these techniques are proper English, but in venues where proper English isn't necessary, they are sometimes employed.

The author's note makes reference to iToons, in which the original dialogue was rewritten using the techniques in the paragraph above.

"Superconductor electromagnetism" is a reference to Street Fighter: The Movie; in it, M. Bison used it to levitate things.

The author did get a Twitter account later.

The author writes:
Assuming the first three panels are all one tweet, Sky broke the character limit at "and I don't like yo". So, reminiscent of 79, here's a rewrite that gets them just under it.

Note: I don't have a Twitter account, and I don't typically type like this even in chat rooms, fora, or texts, so I apologize if I'm grossly abusing abbreviations.

Original Precocious strip: 2010-03-30.

Transcript
{Tiffany is using her "It's Frida's birthday" gift laptop. Her mother comes up, hands on her hips.} Sky: tiff m sry bt i dont thnk its hlthy 4 u 2 hv tht lptp {Tiffany side-eyes her before going back to using it, as it balances on her knees like it's magic. Or superconductor electromagnetism.} Sky: the net is a scry mssd up plce n i dnt lk u gng on it unsprvsd Sky: i thnk its wrpng u Tiffany: hld on im twtng ths {Sky brings her hands up to chest level, turning her palms and fingers skyward, not Sky-ward.} Sky: c?!