Plump, v. t. [imp. & p. p.Plumped (?); p. pr. & vb. n.Plumping.] 1. To make plump; to fill (out) or support; — often with up.
To plump up the hollowness of their history with improbable miracles. Fuller.
2. To cast or let drop all at once, suddenly and heavily; as, to plump a stone into water.
3. To give (a vote), as a plumper. See Plumper, 2.