broad brush
noun [ C usually singular ] uk/ˌbrɔːd ˈbrʌʃ/ us/ˌbrɑːd ˈbrʌʃ/
paint (something/someone) with a broad brush(also use a broad brush) 从大处而不是从枝节处看人
to describe or consider someone or something in a very general way, without paying attention to small details or differences
I hate to paint all young men with the same broad brush, but it's true. 我不喜欢对所有年轻人一概而论,但这是事实。
His narratives are lacking in subtlety; he uses a broad brush. 他的叙述从大处着眼,不拘细节。