This lesson went well with my 3rd and 2nd year MS students, as well as my HS students. It took about 20-25 minutes for MS and 30 minutes for HS. I took a bunch of texting messages from the web and my own, simplified the English and left the slang in, and had students decipher the meanings from slang to 'proper English.' The slangs provided by OP was used in my extension activity. My extension activity took the remainder of the class and even my advanced students were challenged and were surprised how many spelling errors they left uncorrected. I can link my extension activity if anyone's interested.
this sounds amazing! i'm so glad it went over well. I'd love to see the extra activities you did with it. I haven't used this lesson for my 2nd year MS yet so I'd love to add to it and see how they do.