Regardless of what Merriam-Webster wants to say, irregardless is not a word. In fact, my spell checker underlines it because it knows it is NOT a word.
But Merriam-Webster has caved and decided just because A LOT of people use the term, that makes it a word.

The smart alecks at Merriam-Webster responded to complaints in this tweet:
Yep. English is literally dead. https://t.co/hGVXeSNDV7
— Merriam-Webster (@MerriamWebster) July 1, 2020
The Daily Wire reported on this travesty:
On Merriam-Webster’s web pages, the dictionary says “irregardless” is “certainly a word,” even if it “may not be a word that you like, or a word that you would use in a term paper.”
“It has been in use for well over 200 years,” the site says, “employed by a large number of people across a wide geographic range and with a consistent meaning. That is why we, and well-nigh every other dictionary of modern English, define this word.”
The dictionary company claims “irregardless” has the same meaning as “regardless.”
“Many people find irregardless to be a nonsensical word, as the ir– prefix usually functions to indicates negation; however, in this case it appears to function as an intensifier,” Merriam-Webster says. “Similar ir– words, while rare, do exist in English, including irremediless (“remediless”), irresistless (“resistless”) and irrelentlessly (“relentlessly).”
Instead of “slang,” irregardless is defined as “nonstandard” by Merriam-Webster, meaning “not conforming in pronunciation, grammatical construction, idiom, or word choice to the usage generally characteristic of educated native speakers of a language.”
Speaking to NPR, teacher and author Michelle Ray told the outlet that despite the dictionary’s assertion, “irregardless” is “not a real word.”
“First of all, it’s a double negative. … In what context would ‘irregardless’ make sense?” she asked.
Merriam-Webster has turned into a hack company that changes with the wind. This is the same dictionary that in 2019 updated the definition of the word they to include “a single person whose gender identity is nonbinary.”
They also recently caved to a woman who whined about the definition of the word racism.
The Merriam-Webster dictionary is editing the definition of the word “racism” after a Missouri woman wrote to the company requesting that the definition match what she learned at university, that the word really means the “systemic oppression” of groups of people.
Missouri woman Kennedy Mitchum said that she wrote to Merriam-Webster to make the change after she argued with people about the definition of “racism” and realized that her definition didn’t match the dictionary’s, according to a report by KMOV4.
Now, the dictionary says that it will revise the definition of “racism” to include the “systemic” oppression of certain groups of people.
People are passionate about this and are super pissed.
IRREGARDLESS IS NOT A WORD.
I DON'T CARE IF THE DICTIONARY IS BEING HELD HOSTAGE BY NUMPTIES.
IT IS NOT A WORD
— ⚓️Imani Two-Kitchens Gandy⚓️ (@AngryBlackLady) July 2, 2020
how does irregardless and regardless mean the same thing
— 𝑎𝑦𝑒𝑠ℎ𝑎 👁 (@__ayeshaaaaa) July 6, 2020
Irregardless of its new dictionary entry, using it still makes you sound like a dumbshit.
— Feodor Chin 🇺🇸❄️ (@FeoChin) July 6, 2020
Merriam-Webster is wrong and letting the mob run their dictionary. REGARDLESS, we know the truth about good grammar and what words really mean.