This post was going to be titled “Irregardless is Not a Word!” but apparently it sort of is (it’s “non-standard”).
If you say “irregardless”, odds are you either mean:
Regardless [of] : without taking into account
OR
Irrespective [of] : REGARDLESS OF
(Definitions from Merriam-Webster Online Dictionary)
By saying IRregardless, you’ve got a double negative. Thus, your sentence probably doesn’t make sense anymore. I’ve heard a number of people use this recently, so I thought I would mention it for those who might be unaware!