1) to no longer breathe, have a pulse, or being unable to continue to be
alive.
2) refering to
something that is no longer cool or good. Or that has never been.
3) in trouble, started as an exaggeration but now is completely literal
4) electronic that no longer works
5) anything that no longer works or is
broken
6) anything that you can't figure out how to use and you want to blame the thing