slash-and-burn
/ˈslæʃənˈbɜːn/adjective
attrib.
1- of, relating to, or denoting a method of agriculture in which existing vegetation is cut down and burned off before new seeds are sown, typically used as a method for clearing forest land for farming（与）刀耕火种农业（有关）的。
1.1
- figurative aggressive and merciless〈喻〉好胜而无情的：
her slash-and-burn campaigning style.
她那好胜而无情的竞选风格。