Definition of plumpers:
(n) :
(chiefly in the plural) A small ball or pad carried in the mouth to fill out the cheeks.
(n) :
One who plumps or swells out something else.
(n) :
That which plumps or swells out something else.
(n) :
A voter who plumps their vote.
(n) :
(politics) In elections, a vote given to one candidate only, when two or more are to be elected, thus giving the candidate an advantage over the others.
(n) :
(Internet slang) An obese woman, especially in pornography.