Grinds my Gears #3:

Please do not try to correct me on something irrelevant to our conversation, especially if your "correction" is synonymous to whatever it was the I was saying.

Example:

I was on the phone a few days ago and I had said, "...there are so many things..." And the person I'm on the phone with says something along the lines of, "...no, no, no. There are a plethora of things..."

Uh...excuse me?? Okay, see, the fact that I told you like 3 minutes before that I like to read and write does not make you obligated to try to correct or expand my vocabulary. You are not someone that I feel the need to impress with words.

By the way babyboy, I learned the word "plethora" when I was 8 years old...