Also found in: Thesaurus.
1. A girl or woman regarded as dull, plain, or unfashionable.
2. A person regarded as colorless and primly sedate.
[Possibly short for Middle English frumple, wrinkle, from Middle Dutch verrompelen, to wrinkle : ver-, completely; see per in Indo-European roots + rompelen, to wrinkle.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.