pick on
US /pɪk ɑːn/
UK /pɪk ɑːn/

1.
implicar com, pegar no pé de
repeatedly single out (someone) for criticism or unkind treatment in a way perceived to be unfair or unjust
:
•
Why do you always pick on your little brother?
Por que você sempre implica com seu irmão mais novo?
•
The older kids used to pick on him because he was small.
As crianças mais velhas costumavam implicar com ele porque ele era pequeno.