My coworkers have an awful habit of asking me, "Havin' fun yet?" with a toothy grin. I always want to smack the person who says this to me. What am I supposed to be having fun with!
Also, "It's just one of those days." What kind of days are you referring to? Please, explain.
So if you are a person who says either of these things, stop it.
What phrases grind your gears when you hear them?