have nothing to do with sb/sth
idiom.idiom. to not be involved in something or to refuse to have a relationship with someone.
idiom. to lack any connection to a situation or to deliberately avoid association with a person or entity; often used to deny responsibility or express disapproval.
I have nothing to do with their argument.
After the scandal, the company's former partners wanted to have nothing to do with the CEO.
The witness insisted she had nothing to do with the robbery, claiming she was miles away when the crime occurred.
often used in the negative to deny involvement or as a firm social rejection.
this is a useful structure for teaching the 'have + noun + to-infinitive' pattern; contrast it with 'have something to do with' to show how the meaning flips from involvement to exclusion.
I have nothing to do for him.I have nothing to do with him.using 'for' changes the meaning to having no tasks to perform; 'with' is required to express a lack of connection or association.