wouldn't be caught deadwouldn't be caught/seen dead [informal]if someone wouldn't be seen dead in a particular place or doing a particular thing, they would never do it, usually because it would be too embarrassing.
John's dad won't go to the christening, he wouldn't be seen dead in a church. (often +
adv/prep)
Chris wouldn't be seen dead driving a Lada. (often + doing something)
[TahlilGaran] English Idioms Dictionary ▲