How to deal with a colleague who always puts you down?
I favor the Confusingly Positive/Neutral Response in these situations.


"So-and-so did Awesome Thing and you --" "Wow, that's great! When will it be published? I'd like to read it."
"What was your undergrad GPA?" "Uh, I don't even remember. It got me in here, though, and I love it here!"
"Bah, what you're doing is garbage." "I'm finding it a lot of fun, and learning a lot!"


When she pulls these stunts in front of others, you will look infinitely classier than she for refusing to play the game.