for the sake of [看美剧学俚语loki s02e01]

（一）if you do something for the sake of it, you do it because you want to and not for any particular reason

O.B., look, for the sake of argument,、

老欧 我们来讨论一下

（二）Out of regard or respect for someone or something; for the benefit, advantage, or purpose of something or somebody.
为了…,为了…起见,出于…考虑

Let's not spoil the job for the sake of a few pounds.
咱们不要为了几英镑而把工作弄糟.
He argues for the sake of arguing.
他是为争辩而争辩。

还有几个近义短语

in order to for the purpose of 侧重强调目的； for the sake of 侧重表示缘故； with a view to 侧重说明意图。

PS:

还有个更常见的用法。

for the sake of god…… (看在上帝的份上)
for the sake of god，could you just be quiet for a little while?
看在上帝的份上，你就不能安静一会儿吗？