11.beef
梁子

两人、两人以上或几个群体之间的冲突。

例：

There is a lot of beef between the lead singer and the drummer. They hate each other after the drummer insulted the singer’s ability to play guitar.

主唱和鼓手之间结下不少梁子。鼓手羞辱过主唱弹吉他的技术不行，从那之后他们就彼此憎恶。

I have beef with Kennedy airport after they lost my luggage.

肯尼迪机场把我的行李弄丢过，从那以后我就跟它结下梁子了。