adj. 1 chubby, stout, fleshy, ample, full-bodied, portly, tubby, rotund, squat, chunky, buxom, corpulent, roly-poly, fat, obese, overweight, steatopygous, Brit podgy or US pudgy, Colloq busty, beamy, hippy, beefy, well-upholstered They went on a diet because they were getting a bit plump
v. 2 puff up or out When you get up, please plump up the pillows on the sofa