A word contradicting itself, though it never existed prior to 20th-century individuals who began to use it to appear sophisticated, or otherwise literate. The term "regardless," a real word, remains lacking and unknown to such sophisticates.
Teacher: 'Irregardless' is not a word. So, Johnny, please use 'regardless' in a sentence correctly.
Johnny: I fucked datt bitch irregardlessly. There, I used regardless in a sentence. Now, do I get an A?