At an election, a full vote, to one candidate, not shared with another.--Richardson. We use the word in the nine sense; for example, 'Let the Whig voters turn out in a body, and give Harry Clay a plumper.'
·noun A voter who plumps his vote. II. Plumper ·noun A downright, unqualified lie. III. Plumper ·n...
Webster's Dictionary of the English Language