half-assed
adjective slang disapproving (UK also half-arsed) uk/ˈhɑːf.æst/ us/ˈhæf.æst/
（想法）愚蠢的;（计划）考虑不周的
A half-assed idea or plan is stupid or has not been considered carefully enough.
It's another one of her half-assed ideas for getting rich. 这是她另一个发家致富的蠢点子。