pick at
US /pɪk æt/
UK /pɪk æt/

1.
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.