under the knife


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under the knife

Undergoing a surgical procedure, especially an invasive one in which actual blades are used. Typically used in the phrase "go under the knife." My dad is going under the knife on Thursday to clear the blockage in his heart.
See also: knife
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

under the knife

Undergoing surgery, as in He was awake the entire time he was under the knife. The phrase is often put as go under the knife meaning "be operated on," as in When do you go under the knife? Knife standing for "surgery" was first recorded in 1880.
See also: knife
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.

under the knife

Informal
Undergoing surgery.
See also: knife
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
See also: