be on a collision course

be on a collision course

if two people or groups are on a collision course, they are doing or saying things which are certain to cause a serious disagreement or a fight between them All attempts at diplomacy have broken down and the two states now appear to be on a collision course. (often + with ) The British government is on a collision course with the American administration over trade tariffs.
See also: collision, course, on
References in periodicals archive ?
None appears to be on a collision course with the Earth, but Helin said that any one of them could change orbit over time.