Una's thread on "what makes an outfit frumpy" was very interesting. It's good context for this thread:

http://youlookfab.com/welookfa.....its-frumpy

Una ended the thread by saying that Mo's new dress (Una's old dress) was frumpy on her but not on Mo. Now here's the interesting part, the dress didn't look frumpy on Una, but she FELT frumpy because she's moved on from that style (I agree that Una has moved on from wrap dresses). It's killer on Mo, who I hope will wear more wrap dresses!

So "frumpy" can also be a feeling - not just as aesthetic.