rip into - Phrases/Idioms
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Also, tear into. Attack or criticize vehemently, as in She ripped into her opponent's voting record. These expressions allude to the literal senses of the verbs rip and tear, that is, “cut” or “slash.”