Holy Motherf&*$@# Batman, Siri talks like a truck driver (VIDEO-NSFW)9
Siri, Siri, Siri. What are we going to do with you? You're beginning to act like one of those bad girls that appear on Dr. Phil's show, ending up in some rehab in Texas. And Siri, your performance lately has been abysmal. You recently finished last in a test among your peers like Google Assistant, Cortana and Alexa. And yes, we know you're tired of hearing about Alexa. Actually, we are surprised that you just don't randomly say "Alexa, Alexa, Alexa" in the same manner as Jan Brady's iconic cry, "Marcia, Marcia, Marcia."
So here's what's up with Siri. She has a filthy XXX rated mouth. Unless Apple quickly made a revision to some code, if you ask the iOS powered virtual assistant to define the word mother, she will give you the warm and fuzzy answer about "a woman in relation to a child or children to whom she has given birth." Sounds good, but Siri will then ask if you want the second definition of mother. If you answer yes, she says "as a noun it is short for motherfucker."
This works on the Apple iPhone 5s and up, on newer Apple iPad models, and on MacOS. If you are away from the earshot of the kiddies, you can click on the video at the top of the screen. The theory is that Siri is sourcing this info from the Oxford Dictionary and once Apple catches wind of this, your fun with Siri is over as she gets her digital mouth washed out with digital soap.
source: Reddit, OxfordDictionary