plump up 1．fatten养肥；变丰满 *We have really plumped up these chickens．我们确实把这些鸡养肥了。 *The child's cheeks are beginning to plump up．孩子的面颊丰满起来了。 2．fluff out； make appear fat拍松软 *Every evening she plumps up the cushions before she goes to bed．每天晚上睡觉前她都要把垫子拍松。