round on
US /raʊnd ɑːn/
UK /raʊnd ɑːn/
1.
volverse contra, atacar
to turn on someone suddenly and attack them, either verbally or physically
:
•
She suddenly rounded on him, accusing him of lying.
De repente se volvió contra él, acusándolo de mentir.
•
The crowd rounded on the speaker after his controversial remarks.
La multitud se volvió contra el orador después de sus controvertidas declaraciones.