有没有用英语表达"鄙视别人的句子"

I will piss on your grave if you.......如果某人如何做的话，我会在他的坟墓上撒尿（鄙视中加一些气愤）

I would rather set my bum on the cactus than......我宁愿坐在仙人掌上面也不想.......百分之百鄙视某人的标准口语，并且暗含幽默感

最经典的：I shame on you.

despise sb 鄙视。。。
look down on /upon sb 瞧不起某人
think small beer of看不起
I think small beer of you.

I look down on\upon you.

I feel ashamed of you.