pick at something
phrasal verb with pick verb uk/pɪk/ us/pɪk/
disapproving
(因没胃口或不高兴而)一点一点地吃,挑挑拣拣地吃
to eat only a small amount of your food, showing no interest or enjoyment while you eat it
Charles picked at his food in a bored fashion. 查尔斯吃饭挑挑拣拣的,一点胃口也没有。
See also: picky