So, telling someone to " Go suck a lemon" ! is a way of showing your anger.

所以，对某人说" Go suck a lemon！（走开）" 是表达你的愤怒的一种方式。

What's your problem? You've been sucking a lemon all week.

我告诉你我有什么毛病。

Mrs. Driffield looked as though she had taken a dose of castor oil and had just been trying to get the taste of it out of her mouth by sucking a lemon.

德里菲尔德太太那时的神情就像是吃了一服蓖麻油，正在吮吸一个柠檬以便去掉嘴里的味道。