Is there any word you irrationally hate? For me, it is the word "yummy" (or even worse, it's cousin "nummy"). Something about it just sets my brain on edge. Especially if it is used for serious foods. Sure, that adorable decorated cupcake can maybe be described as yummy. But, if I am telling you about the delicious homecooked meal I spent several hours making, there is something so diminishing about calling it "yummy".
I don't police people's use of it or anything. But, if it is used around me, I am cringing on the inside. Anybody else have any words like that, that when you find other people using them, it makes you cringe. I'm talking less grammar errors (though "I seen" bothers me too), and more just specific, innocuous words that people use.