over my dead body - 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.
In no way, under no circumstances, as in Over my dead body will you drop out of high school. This hyperbolic expression is often used jokingly. [Early 1800s]