to fight or argue fiercely

The politicians lock horns during the debate.

The CEO and the Head of Finance are expected to lock horns over the budget for next quarter.

The two project leads frequently lock horns on how the backend framework should be designed, slowing down development.

The Prime Minister and the Leader of the Opposition will likely lock horns in Parliament today over the new tax bill.

I really didn't want to lock horns with my neighbor about the property line, but I had to stand my ground.