pick at
US /pɪk æt/
UK /pɪk æt/

1.
picorer, manger sans enthousiasme
eat food slowly and without much enthusiasm
:
•
She was so upset that she could only pick at her dinner.
Elle était si bouleversée qu'elle ne pouvait que picorer son dîner.
•
He's been picking at his food all evening.
Il n'a fait que picorer sa nourriture toute la soirée.
2.
critiquer, reprocher
criticize someone or something repeatedly, especially in a petty or annoying way
:
•
She's always picking at his grammar.
Elle est toujours en train de critiquer sa grammaire.
•
Don't pick at every little mistake I make.
Ne critique pas chaque petite erreur que je fais.