for all (one) cares(redirected from for all he cares)
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for all (one) cares
One does not care (if something were to happen). The phrase always precedes or follows some hypothetical situation. You can starve to death for all I care. I am not giving you any more of my leftovers.
for all I care
I don't care if (something happens). For all I care, the whole city council can go to the devil. They can all starve for all I care.