People Who Use Nonexistent Words

So, I can't seem to figure out how or when words like "alot," "atleast," and "irregardless" ever became real words.  Somehow they have since people seem to use them commonly these days, even in formal letters.  Can you come up with a limerick to ease my frustration and make me laugh?  Thanks a bunch!  - CS

I see letters that have these fake words
Not just stupid, to me it's absurd
Irregardless ain't real
It just makes me squeal
There's no brain in your head, just a turd