“下流的”的英语可以翻译为：indecent，obscene，[法] blue，underbred，dirty ...

听说有些知名演员也参加了这些下流的聚会。Apparently, well known actors were at these filthy parties.他很喜欢用无礼、下流的双关语。He has a fondness for outrageous double entendre.卢克用手指做了个下流的手势。Luke made a rude gesture with his finger....