It looks frump in the picture but I could see how it could be curve hugging and feminine a size down? (effortlesslywithroxy.com)
I tend to think of frump as being more about ill - fitting, unflattering clothes and, perhaps, a general harried demeanor (wild hair, stains / wrinkles, unintentional half - tucks), but it's an interesting question to ponder. (corporette.com)
And finally hair — I def feel maximum frump when my roots show. (corporettemoms.com)