impulsive
adjective uk/ɪmˈpʌl.sɪv/ us/ɪmˈpʌl.sɪv/
C2 冲动的
showing behaviour in which you do things suddenly without any planning and without considering the effects they may have
Don't be so impulsive - think before you act. 不要如此冲动——要三思而后行。
an impulsive man/decision/gesture 冲动的人／决定／举动