conflict of interest
noun [ C or U ]
ukusplural conflicts of interest LAW
a situation in which someone cannot make a fair decision because they will be personally affected by the result:
The mayor is himself involved in local businesses and has been accused of a conflict of interest.
have/declare/avoid a conflict of interest Board members are required to declare a conflict of interest in the case of any contract that benefits that member's family.
create/present/pose a conflict of interest Working for two companies need not necessarily pose a conflict of interest.