"Read my lips" literally means 读我的唇, but actually it means" you listen to me very carefully".
For example:
A: Do you want to hang out with me tonight?
B: Read my lips. NO. (在讲这句话的时候可以放慢语速,然后把“NO ”的唇形给展现出来,表达他们不愿意的程度。)