irregardless

Used by people who ignorantly mean to say regardless. According to webster, it is a word, but since the prefix "ir" and the suffx "less" both mean "not or with" they cancel each other out, so what you end up with is regard. When you use this to try to say you don't care about something, you end up saying that you do. Of course everyone knows what you mean to say and only a pompous,rude asshole will correct you.

A word used by uneducated people intending to sound intelligent. Often, the defendant will use this word in court in an attempt to impress the judge and jury. Educated people notice and those who use this word instantly identify themselves to educated people as being uneducated. Educated people rarely correct them because it helps educated people more easily identify them if they are well groomed.

An unnecessary mispronunciation of the word "regardless".

A word you should never, ever use in front of your English professor.

this is not a fucking word... Wtf

Irregardless is an illegitimate word, you shitstains! Putting the prefix Ir before the word regardless effectively makes it a double negative; thus the meaning of the word becomes: "without without regard." so instead of the intended meaning, which is without regard, it becomes just the opposite: with regard to!
Irregardless is a non-word that many a tool mistakenly believe to be correct usage in formal style, when in fact it is used chiefly in nonstandard speech or uneducated 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.

For those who are language challenged and obtuse, irregardless means really, really, regardless.