The film must be a real dog. 这部电影一定很糟糕。

Your partner is a dirty dog. 你的合伙人是个卑鄙小人。

The poet died like a dog. 这位诗人潦倒而死。

They treated him like a dog. 他们把他看得猪狗不如。（treat sb like a dog表示不把某人当人看）

He is really a dead dog. 他真是个没用的东西。

Tom's been leading a dog's life since he got divorced. 汤姆自离婚后一直过着混沌潦倒的日子。

（to lead a dog's life 形容人过着贫困潦倒、惨不忍睹的生活）

其他一些借用狗的形象的有趣的英语表达，可以用联想的方法来记忆：

dog's dinner n. 大杂烩，一团糟，混乱的局面

dog-tired adj. 极度疲乏，累极了

rain cats and dogs 下倾盆大雨

not have a dog's chance 毫无机会

sick as a dog　描述病得很严重的样子

the dog days of summer 一年中最热的三伏天

meaner than a junkyard dog 冷漠，不友好

关于“狗”的谚语：

Every dog is a lion at home. Every dog is valiant at his own door. 狗是百步王, 只在门前凶。

Fight dog, fight bear. 一决雌雄。

Give a dog a bad /an ill name(and hang him). 人言可畏。

Love me, love my dog. 爱屋及乌。

Scornful/Hungry dogs will eat dirty puddings. 急不暇择, 饥不择食。

The dog returns to his vomit. 重犯旧日罪恶