tear into

phrasal verb
1
to attack somebody/something physically or with words
حمله کردن, یورش بردن, به شدت انتقاد کردن
2
to start doing something with a lot of energy
شروع به انجام دادن با انرژی کردن, شروع کردن با شور, مشتاقانه شروع کردن, پا به کار گذاشتن با جدیت
They tore into their food as if they were starving.
The band tore into their opening number.