Lean and fat
It is a Chinese idiom. The Pinyin is Ji à OSH à Uli à NGF é I, which means relatively fat and thin. It's from "kite error · happy New Year".
The origin of Idioms
Li Yu of the Qing Dynasty wrote in his "kite error · New Year's greeting": "how ever did you see Hou men Jiao Li, who was thinner and fatter?"
Idiom usage
Used as predicate, attribute, object, etc.
Lean and fat
disciples and old followers or minor officials - mén shēng gù lì