adj. & v.
adj. (esp. of a person or animal or part of the body) having a full rounded shape; fleshy; filled out.
v.tr. & intr. (often foll. by up, out) make or become plump; fatten. plumpish adj. plumply adv. plumpness n. plumpy adj.
[ ME plompe f. MDu. plomp blunt, MLG plump, plomp shapeless etc. ]