wouldn't be seen dead (doing something)
Would never (do the thing being discussed). I wouldn't be seen dead wearing that shirt. You can burn it for all I care. She had always said she wouldn't be seen dead working for that company, but I guess everyone has their price.
would not be seen dead (doing something)
and would not be caught dead (doing something)would not do something under any circumstances. I wouldn't be seen dead going out with Bruno! Martha would not be caught dead going into a place like that.
would not be seen dead
phr. would not do something under any circumstances. I wouldn’t be seen dead going out with Spike!