Frump (noun)

A dowdy or unattractive woman, especially one who is older and dresses in a plain, unfashionable way.

Origin:

Frump comes from the middle english word "fromepe" meaning "shabby or slovenly woman", and is likely derived from the old english "frump" meaning "lump or piece".

Examples:

1. She was often mistaken for a frump, but her intelligence and sense of humor always shone through.
2. He couldn't help but notice the frump sitting alone in the corner.
3. The frumps on the bus were all dressed in drab colors and sensible shoes.
4. She was determined not to be thought of as a frump, so she made sure to dress nicely every day.
5. He felt sorry for the frump at the party who no one seemed to be talking to.