animal
When used scientifically, "animal" refers to any member of the kingdom Animalia, which includes everything from sponges to humans. In a social context, calling a person an "animal" is usually an insult. It suggests that the person lacks manners or self-control and is acting based on raw instinct rather than reason.
💬Casual Conversation
🎬Tuesday afternoon, Maya is texting Fatima about their mutual friend Ryan's behavior at a party last night.
Maya
Did you see Ryan last night? Total animal.
Fatima
I'm still reeling. He totally trashed the living room.
💡
Maya uses 'animal' in its second definition (a person behaving uncivilized/violently). Fatima responds using the idiom 'still reeling', meaning she is still shocked or upset by the events.