Webster's 1828 Dictionary
PLUMPER
n.Something carried in the mouth to dilate the cheeks; any thing intended to swell out something else. 1. A full unqualified lie. [In vulgar use. ]
Webster's 1913 Dictionary
PLUMPER
PLUMPER Plump "er, n.
1. One who, or that which, plumps or swells out something else; hence, something carried in the mouth to distend the cheeks.
2. (English Elections )
Defn: A vote given to one candidate only, when two or more are to be elected, thus giving him the advantage over the others. A person who gives his vote thus is said to plump, or to plump his vote.
3. A voter who plumps his vote. [Eng. ]
4. A downright, unqualified lie. [Colloq. or Low ]
Duden Dictionary
Plumpe
Plum pe Substantiv, feminin veraltet, noch ostmitteldeutsch, ostniederdeutsch , die |Pl u mpe |Pumpe
plumpen
plum pen schwaches Verb ostmitteldeutsch |pl u mpen |pumpen
The Wordsmith Dictionary