round on

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

наброситься на, напасть на

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

:
She suddenly rounded on him, accusing him of lying.
Она внезапно набросилась на него, обвиняя во лжи.
The crowd rounded on the speaker after his controversial remarks.
Толпа набросилась на оратора после его спорных замечаний.