pick at

US /pɪk æt/
UK /pɪk æt/
"pick at" picture
1.

picotear, comer sin ganas

eat food slowly and without much enthusiasm

:
She was so upset that she could only pick at her dinner.
Estaba tan molesta que solo pudo picotear su cena.
He's been picking at his food all evening.
Ha estado picoteando su comida toda la noche.
2.

criticar, sacar punta a

criticize someone or something repeatedly, especially in a petty or annoying way

:
She's always picking at his grammar.
Siempre está criticando su gramática.
Don't pick at every little mistake I make.
No critiques cada pequeño error que cometo.