灾星

děng zhè rén kàn dào tā men ná zhe dāo cái zhī dào hǎo jiě mèi de nán yǒu yǐ chéng wéi zì jǐ de zāi xīng

等这人看到他们拿着刀，才知道“好姐妹的男友”已成为自己的灾星。

It was only when one saw that they were holding knives, that one realized that the "boyfriend of one's good friend" had come to spell trouble for oneself.

tā shuō wǒ shì zāi xīng huì yǒu bù hǎo de yùn qi

他说我是灾星，会有不好的运气。

He says I am a jinx, always bringing bad luck.

tā dì di shì tā shēng huó lǐ de zāi xīng

她弟弟是她生活里的灾星。

Her brother is the bane of her life.