It's not exactly a phrase she says, but a habit she has of misgendering pets, including her own. Drives me nuts. I'm not really sure why. I guess I just don't understand how that happens when you know your own cat is a she. Or when I just referred to my dog as he and she immediately calls him she.

Also she spells loser as "looser." This happens when I say something about feeling like a loser. My head feels like it's going to explode when she responds that I am not a "looser." So then I respond to that, again spelling loser correctly hoping she will notice. But she doesn't and responds again with "looser." I know I'm being pedantic but it does take a lot for me to restrain myself on these sorts of occasions.