1. Incredulity - n.
The state or quality of being incredulous; disbelief.
"It appears to my incredulity....that she really is doing a remake of the dress that was designed by Chloe..."
2. Repartee - n.
A swift, witty reply.
Conversation marked by the exchange of witty retorts.
"A substantial part of this challenge is seducing Nicky with your model and with your repartee..."
3. Gewgaw (Gewgaw-y apparently is an original Tim-ism!) - n.
A decorative trinket; a bauble.
"It contributed to their...that they were kind of gewgaw-y and...I had a problem with them..."
From the French for "I accuse."
"Nicky Hilton looks at Marla's outfit and sort of does a "J'Accuse!"
Here is a reference article for the origin of this usage. Tim Gunn is a master - I'm sure lots of his references go WAY over my head.