There is a German music band called "Die Toten Hosen". Is it a metaphor or just a creation by this band with no deeper meaning?
There is the colloquial (youth language) expression
which means "nothing going on" or "off-time.", something that is lacking in energy.
Gestern Abend war echt tote Hose in der Innenstadt.
Yesterday there was nothing going on downtown.
The literal translation is "dead trousers."