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be the death of

be the death of idiom

Cause the death of something or someone, as in This comedian is so funny, he'll be the death of me. Although this phrase can be used literally, meaning “to kill someone or something,” it has also been used hyperbolically (as in the example) since the late 1500s. Shakespeare used it in 1 Henry IV (2:1): “Since the price of oats rose, it was the death of him.”

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.