round on

US /raʊnd ɑːn/
UK /raʊnd ɑːn/
"round on" picture
1.

scagliarsi contro, attaccare

to turn on someone suddenly and attack them, either verbally or physically

:
She suddenly rounded on him, accusing him of lying.
Improvvisamente gli si scagliò contro, accusandolo di mentire.
The crowd rounded on the speaker after his controversial remarks.
La folla si scagliò contro l'oratore dopo le sue osservazioni controverse.