dead school 

The past, with negative associations. Products, styles, ideas, whatever it is that's pointless and from previous generations.

He still doesn't know how to rip his music; he jogs around with a dead school CD player and headphones from the nineties.

dead school by chokingplanet February 17, 2009

dead as a missing schoolgirl 

someone/something that is clearly doomed

This is your captain speaking, with our remaining engine having burst into flames I can inform passengers that they are as dead as missing schoolgirls

dead as a missing schoolgirl by butt weasel August 29, 2003