under the knife

Meaning

1. having a medical operation

In the movies · 3

• No athlete wants to go under the knife.Trainwreck2015
• Who is this under my knife?Gangs of New York2002
• He had 'em under his knife!Avatar: The Way of Water2022

From the same entry

• the knives are out
• like a knife through butter
• put the knife in
• turn the knife