From Middle English frumplen, cognate with Dutch frommelen (“to wrinkle”). Related to frump, frumpy, frumpish.
frumple (third-person singular simple present frumples, present participle frumpling, simple past and past participle frumpled)
- (transitive) To wrinkle; crumple; ruffle; disorder.
From Middle English frumpil, frumpylle, from the verb.
frumple (plural frumples)
- A wrinkle.