caught dead, wouldn't be
Also, wouldn't be seen dead. Would have nothing to do with, detest, as in I wouldn't be caught dead in that outfit, or He'd not be seen dead drinking a cheap wine. This hyperbole is always put negatively. [Colloquial; first half of 1900s]
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.