I repeat, "irregardless" is an oxymoron.

I was about to type into my facebook status "Joni Lynne does not understand why the word "irregardless" continues to circulate". Then I thought, hey, let's google it.

Google knows all.

I found two enlightening-and-then-depressing definitions from dictionary.com.

READ.

ir⋅re⋅gard⋅less
  /ˌɪrɪˈgɑrdlɪs/
–adverb Nonstandard. regardless.
Origin: 1910–15; ir- 2 (prob. after irrespective) + regardless

Usage note: Irregardless is considered nonstandard because of the two negative elements ir- and -less. It was probably formed on the analogy of such words as irrespective, irrelevant, and irreparable. Those who use it, including on occasion educated speakers, may do so from a desire to add emphasis (Ahh, could this really be so??). Irregardless first appeared in the early 20th century and was perhaps popularized by its use in a comic radio program of the 1930s.

Usage Note: Irregardless is a word that many mistakenly believe to be correct usage in formal style, when in fact it is used chiefly in nonstandard speech or casual writing. Coined in the United States in the early 20th century, it has met with a blizzard of condemnation for being an improper yoking of irrespective and regardless and for the logical absurdity of combining the negative ir- prefix and -less suffix in a single term. Although one might reasonably argue that it is no different from words with redundant affixes like debone and unravel, it has been considered a blunder for decades and will probably continue to be so.

oh, tragic.