After two hours, a plump nurse came in and took him to the doctor's office.

plump 是形容词，意思是"丰满的、圆润的"，通常用来形容人时带有温和的褒义色彩，指体型圆润但不肥胖。这个词比fat（肥胖）更礼貌，比chubby（胖乎乎的）更正式一些。