No, it's not your vocabulary. It's a phonetic butchering of language. I understand people typing somehting like "gimmie" instead of "give me," especially if it's used in a rap and it helps with the rhymes, but saying "yo i m fukin gr8 at dis rap shit n u sux" makes the poster look like a idiot (which is probably the case.)

Anyway, it's not my problem, it just looks funny to me.