These examples, as many others which occur, are misunderstandings of words whilst texting on a mobile phone with the dictionary function activated, which lead to nonsensical phrases. These usually take time to decipher completely the meaning, before the reader can understand what is said.
Youths have been pushed to ignore these constant 'cock-ups' of the function, and have therefore started to send messages with these words in place of the actual words. People have begun to comprehend this new text language.
Message1: You comin 2 the club tonite?
Reply: Nah, I'm stayin at good.
Message2: I bought a sick new car 2day
Reply: Ah sick man thats book.