上膘

shàngbiāo
  1. (of livestock) to fatten up
  2. to put on weight

CEDICT

  1. (of animals) to grow stout and strong day by day
  2. to grow stout and strong day by day

Wiktionary

Entry Composition

1 上 shàng
  1. (bound form) up; upper; above; previous
  2. first (of multiple parts)
  3. to climb; to get onto; to go up
  4. to attend (class or university)
  5. (directional complement) up
  6. (noun suffix) on; above
=2 膘 biāo (usu. of livestock) fat
=2 膘 biāo variant of 膘 biāo

Related entries

发福 fāfú
  1. to put on weight
  2. to get fat (a sign of prosperity, so a compliment)
我奶奶年轻的时候身材很苗条，现在年纪大了就发福了。

When my grandmother was young, her body was very slim. Now in her old age she's grown plump.

Source: Tatoeba

发胖 fāpàng
  1. to put on weight
  2. to get fat
她是在为其担心她会发胖的饮食。

She is on a diet for fear that she will put on weight.

Source: Tatoeba

长肉 zhǎngròu to put on weight