mix your metaphors idiom
（常产生愚蠢、滑稽效果的）混合隐喻
to combine two or more metaphors, often producing a silly or humorous effect
Mixing his metaphors, he described the problem by saying "We've opened up a can of worms here, and now we have to get the genie back in the bottle". 他用混合隐喻形容面对的问题，“我们打开了一个‘虫罐子’，现在我们必须把妖怪放回瓶子里去”。