'To be done for' can mean a) Exhausted or worn out 'This old computer is just about done for.' b) No longer effective, capable or valuable. 'After the accident he was done for as an athlete.' c) Beaten or defeated. 'When the opposition scored another goal, the team knew they were done for.' d) Charged with a crime 'He was done for drinking and driving' e) Dead or dying 'Before he went to hospital he seemed to think he was done for.'

'to be done for' can also be an idiomatic phrase, meaning that you are doomed, or have gone so far wrong that death or destruction is the only likely outcome.

Some people in the UK say "be done for" instead of saying "be arrested for" or "be charged for" in the case of the law. It is sometimes used in stories, especially for children, when "done for" is a substitute for "to be punished."

to be done for= to be in trouble