pile on


The weight just piled on while I was abroad. 我出国期间体重一个劲地增加.

pile on: (especially of a person's weight 尤指体重) to increase quickly 剧增;猛增

People regularly fail to think about what they are eating and many are piling on the pounds as a result, study showed.

调查显示,人们往往不去想自己究竟在吃些什么,所以许多人因此而长胖.

pack on


Late-night snacks could pack on the pounds. 吃宵夜会长胖.

pack on - gain (weight)

He packed on two pounds over the summer.

一个夏天他胖了2磅.

put on


put on:to become heavier, especially by the amount mentioned 增加体重(若干);发胖

She looks like she's put on weight. 她似乎发胖了.

flesh out


flesh out:make fat or plump (使)长胖,丰满

He finished growing taller last year, and now he's fleshing out. 他去年起已不再长高了,现在正在长胖.

fill out


fill out: If a fairly thin person fills out, they become fatter. 长胖

John finished growing taller last year, and he's filling out. 约翰去年就停止长高了,现在他正在长胖.

Her figure has filled out since her marriage. 婚后她就开始发福.

gain


I've gained weight recently. 最近我的体重增加了.